The correct answer would be
B. Fiber
Fiber is the indigestible portion of food from plants.
Animals can be classified into two main groups: vertebrates and invertebrates. The main difference between vertebrates and invertebrates is that invertebrates, like insects and flatworms, do not have a backbone or a spinal column. Examples of vertebrates include humans, birds, and snakes.
Friction would cause the box to be harder to push
I believe the answer is hormones. correct me if i'm wrong.
Here is my answer. The brain and the nervous system assists in times of limited body resources by sending signals to the brain the necessities or needs that the other body systems require in order to function properly. Hope this answers your question. Have a great day!
