1. What living things are found in the picture?
2. What is given off by the tree that is needed by the cow? What is
given off by the cow that is needed by the tree?
3. What do you think will happen if the cow or other animals will not
give off carbon dioxide? What do you think will happen if trees or
other plants are not present in the environment?
4. Do they have important roles in the environment? What are they?
5. Are the organisms interacting with each other? Is the interaction
beneficial or harmful?​