
Photosynthesis is a process by which phototrophs convert light energy into chemical energy, which is later used to fuel cellular activities. The chemical energy is stored in the form of sugars, which are created from water and carbon dioxide.
The correct answer is b because not all countries can support themselves (c) and malnourishment can occur in any country. For example, in the United States, around 40 million people lived in food insecure households. Also, according to my middle school english teacher, the world will not have enough food to sustain itself by 2050 (a).