Students are each given 20 grams sample of an unknown solid compound in a clear plastic bag. They are instructed to break the material into smaller parts by gently hitting it with the hammer. Some of the parts break into large chunks and some look like a fine powder.

Which of the following is an example of competition a. the leaves of a tree prevent a small shrub from getting sunlight. three species of birds feed a different heights in the same tree. b. three species of birds feed at different heights in the same tree c. zebra and giraffe’s feed on different grassland plants d. cats living in two different homes eat the same brand of cat food.