Find the mistake.

Drought, rising temperatures and heat waves have been affected the food and water supply.

A. rising temperatures

B. heat waves

C. been affected

D. water supply

What does the notice mean?

Find the mistake.

The local farmers are trying to stop the invasive species from spreading for the past six months.

Choose the best answer.

The red squirrel in England is in danger of ______.

Choose the best answer.

The national park was established to ______ the ecosystem of the limestone forests.

Choose the best answer.

One of the factors that cause a species to become endangered is habitat ______.

Choose the best answer.

Some people ______ down lots of trees along the river for the past two weeks.

Choose the best answer.

Scientists have been developing practical tools and methods to measure the ______ of the ecosystem.