Part of speech

_____ is a study of plants, animals and how they interact with their environments.

• Biology

• Biologist

• Biological

• Biologically

a/ an _____species is a population of organism which is at risk of becoming extinct.

• dangerous

• endanger

• endangered

• endangerment

Only a few many endangered species actually obtain legal _____

• protect

• protection

• protective

Many nations have laws of protecting to these species, such as forbidding hunting or creating ______

• agencies

• reserves

• awareness

• challenges

______ is the existence of a wide variety of plants, animals living in their environments.

• Conversation

• Biodiversity

• Globe

• Individual

This book is not really _____. It is waste of money buying it.

• information

• inform

• informative

• informatively

Sometimes it is ______ to find suitable books for our children.

• difficult

• difficulty

• difficulties

• difficultly

The referee's_______ is the most important in any sport competition.

• decide

• decisive

• decision

• decider