I guess it would have to be A
The correct answer is A. Cephalic phase
Explanation:
In the digestive system and digestive process, there are different phases or stages. In the case of the cephalic phase, this is the first phase of the process and starts even before food enters in the organism, because fo this, the cephalic phase includes the anticipatory responses to food including salivation. This is the part or phase Pavlolv stimulated in his experiments because in this dogs salivated anticipating food and this was linked to the sound of a bell and that make dogs salivate even if there was no food.
We should use wind and solar energy more because those are the two main renewable energy sources, the sun shines a lot so we can use the power from that to power are houses, but at night that would be a problem, so at night you could use water as a renewable energy to power your house at night so you can get light, wind would be good if you live in a windy place like Cheyenne WY.
Photosynthesis is a very complex process that occurs when sunlight and oxygen are present.
Good luck
Because plants go through a cycle(the cycle is seed, seedling, plant, flower and tree.) and it takes time for the plant food, water, and nutrients to go though the plant.
