阅读短文，选择最佳答案。

    This is the sun. It is as tar. It is a big thing in the sky. In the morning it rises in the east(东方). It is red and big and it is not hot.

    At noon, the sun is small but it is hot and bright. We must not look at it. It is bad for our eyes.

    At night we can't see the sun. But we can see the moon and stars.

    In the evening the sun goes down in the west(西方). We can't see it. And the

weather is dark(暗了). We all need the sun. Animals and plants both need the sun, too. Because it can give us light and heat.