Choose the sentence which has the closest meaning to the original one.

If humans continue to overfish, marine ecosystems will collapse.

Plastic waste is not biodegradable because it seriously harms marine ecosystems.

Plastic waste seriously harms marine ecosystems since it is not biodegradable.

Plastic waste is not biodegradable, so it seriously harms marine ecosystems.

Plastic waste seriously harms marine ecosystems, but it is biodegradable.

Marakele National Park has a diverse exhibition of fauna and flora despite the fact that the weather is dry and wet.

Even if the climate is diverse, Marakele National Park offers a diverse exhibition of fauna and flora.

As a result of different types of climate, Marakele National Park is native to a diverse exhibition of fauna and flora.

Marakele National Park can be home to a diverse exhibition of fauna and flora if the weather is less arid and wetter.

Air pollution is increasing rapidly, although many cities are planting more trees.

Many cities are planting more trees, so air pollution is increasing rapidly.

Air pollution is increasing rapidly; therefore, many cities are planting more trees.

Many cities are planting more trees; however, air pollution is increasing rapidly.

The forest fire destroyed thousands of trees, so it caused serious air pollution.

The forest fire not only destroyed thousands of trees but also caused serious air pollution.

Although the forest fire destroyed thousands of trees, it caused serious air pollution.

Because the forest fire caused serious air pollution, it destroyed thousands of trees.

The fishing cats are on the list of endangered species; otherwise, people hunt too many of them.

The fishing cats are on the list of endangered species since people hunt too many of them.

The fishing cats are on the list of endangered species; by contrast, people hunt too many of them.

The fishing cats are on the list of endangered species; therefore, people hunt too many of them.

It wastes time reading books about plants and animals.

Reading books about plants and animals is favourable.

I'm a big fan of reading books about plants and animals.

Reading books about plants and animals is an activity.

The thousand-year-old tree is not as big as the one in the national park.

The national park is the biggest one and is a thousand years old.

The biggest tree in the national park is a thousand-year-old one.

The national park has a big thousand-year-old tree.