Answer:
Water, Carbon Dioxide, and Sunlight
Explanation:
After the process is complete, photosynthesis releases oxygen and produces carbohydrate molecules, most commonly glucose. These sugar molecules contain the energy that living things need to survive.
A- if you look up the word “evolution” it will show many types of animals forming up into what we call humans
Reproductive system and it's functions
Amount of rainfall
I’m not sure if this is right but I think it is because all of the rest are major parts of ecosystems, and although rainfall is too, it’s more of a natural source that happens anywhere whereas the rest of the options may determine the ecosystem