by attaching to green plants and taking the plants' food by combining carbon dioxide and water to make its own food by absorbing matter from dead organisms to use as food by attacking bacteria and using the bacteria as food
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: How does a mushroom obtain energy?
Possibilities:
- by attaching to green plants and taking the plants' food
- by combining carbon dioxide and water to make its own food
- by absorbing matter from dead organisms to use as food
- by attacking bacteria and using the bacteria as food

by absorbing matter from dead organisms to use as food