Answer:
the sun
Explanation: the sun provides sunlight and plants use that to make glucose and other things
I think A is the right answer because secondary consumers are herbivores. I am 99.9% sure about this.
The answer would be adaption or evolution in the animal kingdom
I don't know if this will help you or not but here you go.
https://quizlet.com/225903868/lesson-11-the-nature-of-life-unit-test-biology-a-unit-1-the-nature-of-life-flash-cards/
