Earthquakes cause buildings to fall and injure or kill people. So engineeers and architects are trying to make buildings safer. Skyscrapers are built so they sway but don't fall when earthquakes strike. Some buildings are put on rollers while others have steel beams anchored into the ground. Builders also use stronger and more flexible materials. A new idea is to put heavy weights in buildings so that if they move one way, the weight moves the other way to help keep the building from toppling. Which title best summarizes this paragraph?

Turtles have been around for more than 200 million years. Scientists think they are the most ancient of all reptiles. Turtles live in many places on land and in water. Like all reptiles, they are cold-blooded. Turtles that live where winters are cold usually hibernate. Turtles eat insects, fish and frogs. They also munch on plants, including fruit and flowers. The largest turtle is the leatherback, which can weigh more than 2,000 pounds! Which title best summarizes this paragraph?

Most communities have laws about how high fences can be in residential neighborhoods. Why? One reason is safety. Fences that are too high can block the view of motorists in driveways or near intersections. Another reason is that people tend to argue about fences that neighbors put up, saying they are unattractive or made of ugly materials. Fences can also restrict the rights of others by blocking views, light, or airflow. Good laws help settle such disputes. Which title best summarizes this paragraph?

The phrase "flotsam and jetsam" is often used to refer to the unfortunate in society. However, these words once referred to cargo found floating in water. Flotsam was cargo from a wrecked ship. Jetsam was cargo that was purposely thrown overboarad either to lighten the ship's load or to keep the goods from going down with the ship. Jetsam belonged to the ship's owner. Anything that was flotsam belonged to the government. Which title best summarizes this paragraph?

Consumers often spend a few puzzled moments looking at egg cartons in supermarkets. That's because there are six official egg sizes. The sizes are determined by weight. A jumbo, the largest-size egg, weighs 30 ounces while a peewee egg, the smallest size, weighs only 15 ounces. In between are extra-large, large, medium and small eggs. Most markets only stock the four largest sizes; small and peewee eggs are usually sold to bakers and companies in the food processing business. Which title best summarizes this paragraph?