Choose the best answer.

The ______ living by the river has been uprooted and then transported away.

Choose the best answer.

Natural resource managers ______ the needs and behaviors of wildlife.

Choose the best answer.

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

Choose the best answer.

Ha Long Bay is the product of geological ______ that lasted more than 500 million years.

The new varieties of rice grow well ______ in poor soil.

Choose the best answer.

The search for the new kind of penguin in Antarctica has been ______ international media attention.

Choose the best answer.

Scientists have been studying different ecologies ______ the 20^th century.

Find the mistake.

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