According to the passage, the sun is vital because ______ .

* Hướng dẫn giải

Dẫn chứng: Almost all the energy on the earth comes from the sun. Heat from the sun makes the earth warm enough for life. Plants use the sun's energy to live and grow. Plants give off a gas called oxygen. Animals eat plants and breathe oxygen. Animals need plants in order to live, and plants need the sun.

Đáp án đúng: C. plants, animals and people need energy from the sun