velocity is a vector so it has a magnitude and direction so the answer would be B
Circadian rhythms ....its just behavior that is repeated over 24 hours
Multiple species aka animals, humans, plants and all the species interactions :)
Increase and decrease in oestrogen and progesterone.
After the solar cycle takes place, bigger sun spots appear, flares appear, and the solar radiation changes.
If this doesn't answer your question, I'll try again. If there are options feel free to comment them as it can narrow down my choices.
Have a good day!
