3 Read the text and fill in the gaps (1-8) with the correct word. Listen and check.

The food chain ends with dead animal bacteria use as food. 5) **organisms** complex organic compounds which then retur that plants can use 6) **again** again. That's how starts all over again. The chain provides the energy that all living things survive. If 7) **chain** is a break in the link in the rganisms above this link are in danger of extine world without plants. How would am 3) **survive**