Choose the sentence A, B, C or D that is closest in meaning to the original sentence.

The flora and fauna on Earth create an ecological balance.

The world's longest river is the Amazon River, which flows through South America.

South America is the largest river in the world, which flows through Amazon.

The Amazon River, which is also called South America, is the largest river in the world.

The Amazon River, which flows through South America, is the world's largest river.

He is very tired because he wasn't slept well.

He was very tired because he hadn't slept well.

He has been very tired because he wasn't sleeping well.

He is very tired because he has slept well.

There is only liquid water on Earth.

Earth is the planet with liquid water only.

The only planet with liquid water is Earth.

Earth is much covered with liquid water.

The Sahara, which is the largest hot desert, covers much of North Africa.

North Africa is the largest hot desert, which covers the Sahara.

The Sahara and North Africa are the two hottest deserts in the world.

No desert is hotter than North Africa, which is located in the Sahara.

Plants and animals need water bodies and landforms for their habitats.

Essential habitats for plants and animals create water bodies and landforms.

Water bodies and landforms cover all living habitats.

Water bodies and landforms need plants and animals.

Humans often use land for farming and housing.

Natural habitats are also land for farming and housing.

Humans have always used living habitats to farm.

Natural habitats are often used for farming and housing.

Indochina is the highest peak of Fansipan, which is located in Viet Nam.

Mount Fansipan, which is located in Viet Nam, is the highest peak in Indochina.

Mount Fansipan and Indochina are the two highest peaks in Viet Nam.

Even though Mount Fansipan is high, there are higher mountains in Indochina.