Choose the best word or word combination to complete each sentence.

Choose the correct option.

Some marine animals have recently become endangered because of the [pollute|polluting|pollution].

Some people are more [danger|dangerous|endangered] than wild animals.

The number of [environment|environmental|environmentally] problems is increasing nowadays.

The air in the tropics is [warm|warmer|warming] all year round.

My parents moved to the countryside and built a nice [house green|green house|greenhouse].

These people live on the streets; they don't have any [home|homeless|homelessness].