Which is the BEST explanation why photosynthesis is so important to people and to all life on Earth? a Photosynthesis produces the oxygen and food energy that all non-plant organisms require to survive.

b Only plants (and some bacteria) have chloroplasts and can photosynthesize, which produces oxygen that all non-plant organisms need.
c Plants are the original producers of food for all other life forms; without plant life, there could not be animal life.
d Many people take plants for granted and don’t realize how essential they are, so it is important that photosynthesis take place even when no one notices.