Where do electrons get their energy in photosystem i? a. from nad and nadph b. from energy in photons c. from adp and atp d. from glucose in the calvin cycle

That would be B. From energy in photons.

Photons(from sunlight) give energy to electrons and “excite” them(sending them to a higher energy level). Electrons can then release this energy and excite other electrons in other chlorophyll molecules.

D. peatlands,grassland,swamps

U. life is what you go through to become a better person. it makes you stronger, wiser, and more creative. it can be hard but its ok. because i believe everyone was put here for a reason. whether or not you know that reason you should always look towards the future and trust in god for a better tomorrow.be safe and blessed