Answer: I think it's B
Explanation:
I think it might be B because of the one celled organisms. Let's just see what the others say tho. But yeah I think it's B.
These structures have the function to move around.
Option: C
Explanation:
Tortoise is one animal who used to hide its body under a protective shell. To move its body parts take sharp bend and move around. It belongs to reptile family. It has four legs. Turtle's leg only appeared when it move on the land surface. It takes much time to move. Whole body remain under the shed of hard shell.
Turtles easily move into the water. They are good swimmer. They faced difficulties in moving on the ground mainly on undulating surface. They move very awkwardly. Their body weight is very heavy that is one of the problem in crawling.
Intraspecific competition drives natural selection,as individual members of a species compete with each other for limited natural resources.
The answer is b and c because of the energy pyramid
