Which type of text structure answers the questions what happened and why?

The earth's crust is made up mostly of hard, rocky substances, though some of these substances have crumbled into dirt from years of exposure to wind and rain and roots of plants. That crust is many miles thick (though the part under the ocean is thinner than the part on land). Underneath the crust is a layer called the mantle. The mantle is about 1,800 miles thick. Below the mantle is the earth's core, which is made up of two layers called the inner core and the outer core. What type of text structure is this?

Choose the clue words that indicate compare and contrast.

What text structure talks about order in time?

Choose the clue words that indicate problem and solution.

How do mountains like these disappear? As it rains, water seeps through cracks and joints in the stone. Chemicals in the water dissolve small grains of rock. Later on, the water freezes and thaws, prying loose bigger pieces of rock. These rocks grind against other rocks as they slide downhill. The wind carries away particles of dust behind by these grinding rocks. As a result, it can be said that wind, water, and gravity have hauled away these mountains. What type of text structure is this?

Which type of text structure describes events in order (First, Next, Then, Finally)?

Some dogs and cats do not have homes. People started animal shelters to take care of these animals and solve the problem of homeless animals. At the shelters, dogs and cats get food and water. They get to play with other dogs and cats. Sometimes, people bring a lost animal to the shelter. Some of these dogs and cats get a new home! People come to animal shelters to get a new pet. What type of text structure is this?

Ice-cream is a delicious frozen treat that comes in a many different colors and flavors.  Two of my favorite flavors are strawberry and chocolate.  Though both of these flavors are delicious, strawberry may contain pieces of fruit while chocolate usually will not.  Even though more chocolate ice-cream is sold across the country annually than strawberry, each flavor tastes great inside of a milk shake. What type of text structure is this?

A difficulty is described and an answer is offered.

Differences and similarities of two or more things are discussed.

It was the most beautiful banana split that I had ever seen. In the middle of the bowl, there were three scoops of ice-cream: chocolate, strawberry, and vanilla. On top of the ice-cream were a banana and a thick web of chocolate and caramel sauces. A huge puff of whipped cream covered the sauces and a handful of crushed nuts dappled the whipped cream. On top of it all was a cherry, but I've never like the soggy squish of cherries. What type of text structure is this?

When it comes to making ice-cream, you can do it the traditional way, by stirring it in a frozen container, or you can use liquid nitrogen to freeze your mixture. There are some advantages to using liquid nitrogen. Since liquid nitrogen freezes the mixture faster, the crystal grains are smaller, giving the ice-cream a creamier texture. The downside is that ice-crystals grow faster in ice-cream prepared using liquid nitrogen, so it must be stored at much colder temperatures. Both methods produce a distinct texture, and both are delicious. What type of text structure is this?