The panda is an __________________ animal; there are very few left in the world.
endangered
Dinosaurs became __________________ millions of years ago.
extinct
Conservationists work hard to __________________ animals from disappearing forever.
prevent
The __________________ of tigers has dropped dramatically due to habitat loss.
population
Pollution is a major __________________ to sea life.
threat
The zoo __________________ looks after the lions and their habitats.
keeper
The television __________________ introduced the documentary about animal rescue.
presenter
Many animals perform tricks in a __________________ for entertainment.
circus
Teachers often explain new ideas about environmental conservation using __________________ to help students understand special vocabulary. Sometimes there are __________ to help readers visualise concepts.
technical terms; pictures
Every paragraph should start with a __________________ that introduces its main idea.
topic sentence
After the topic sentence, the writer includes __________________ to explain, prove, or give examples related to the main idea.
supporting details
The __________________ of the book is "Save the Environment!"
title