The answer is: B) Serving as a food source.
Explanation:
A) Providing carbon dioxide. Plants basically soak in Carbon Dioxide, which through photosynthesis becomes oxygen. That being said, A isn't correct.
B) Serving as a food source. Plants are eaten by many animals.Which that being said means that Plants serve as a food source. That being said, B is correct.
C) Receiving energy from the sun. C isn't correct because, plants are getting energy from the sun and not providing as a food source.
D) Providing shelter from weather. In many cases, plants can provide shelter for animals. The plant isn't providing energy for the animal. That being said, D isn't the answer.
I hope this help's! :)
