Piaget championed the position
called constructivism. Constructivism is a theory on learning, which suggests that
people acquire knowledge from their experiences and together with knowledge
that they already have, construct their own understanding of these things. Piaget's
theory extends over learning theories, teaching methods, and education reform.
Answer: I believe it is D, the Nervous System.
Explanation:
Pollination is a very important part of the life cycle of plants. Insects, birds, bats and the wind take pollen between flowering plants, which means the plants can make seeds and reproduce (have babies!).
The homeostasis of the human body works like a machine set at a particular standard. If the factors deviate from the standard values, the homeostatic mechanism come into action.
For example, if a cell requires certain protein, the respective genes get a signal and get activated. The cell start synthesizing the protein and when sufficient amount is made, there is a feedback loop, which allows the same protein to stop the synthesis as well. A lot of organs and cellular systems are involved in regulating the synthesis of this protein.
This is similar to the cooling system. If we set the temperature of the cooling system to certain degree, it will start cooling the room till the required temperature is reached. As soon as the temperature is acquired, the system cut-off automatically and the required temperature is maintained.
Because these volcanic activities happen on plate tectonics.
This is not the best answer but I hope it could help you.