Câu hỏi :

Read the following passage and mark the letter A, B, C, or D to indicate the correct answer to each of the questions.

A. All the plants in a wood are eaten by animals.

B. All the animals in a wood depend on plants for their food supply.

C. Plants and animals in a natural community do not interact with their non-living surroundings.

D. The balance of a natural community means there is no primary species.

* Đáp án

* Hướng dẫn giải

Đáp án: B

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