Why is all life in danger Because （） break up the food chains.

单项选择题Which living things can use sun energy directly（）

A．Animals.
B．Plants.
C．Both animals and plants.
D．All living things.

单项选择题How do all food chains break（）

A．One kind of animals is eaten up.
B．One kind of plants is destroyed.
C．One kind of animals eats another.
D．One of the links is destroyed.