We can do something to help ______ the environment as it provides us with many essential things.

The last dinosaurs died out millions of years ago, so they are ______ species.

Animals are in danger of ______, like tigers and rhinos.

Darwin’s theory of evolution has helped to explain the disappearance of some species and the ______ of others.

_________________ helps to maintain the balance of nature that we rely on for our well-being and bene­fit.

Through the years they have made significant contributions to species______.

We should protect the most ______ members of our society since they are easily hurt physically and emotionally.

It was announced on TV that a new wildlife park will open ______ the public next week.

Having a picnic or ______ a campfire in the park may scare the animals and pollute the air.