Not sure but i think cohesion forces
The answer is bones in mammals
Answer:
The correct answer is A), see the explanation below, please
Explanation:
You can see in the graph the different levels of organization from above (molecules, then all the cells, below all these originate specialized tissues and below all the group of organs that make up an organism). The organs are formed by a set of tissues.
He could not explain why the continents were moving.