Question

1. where do plants get their energy from?

chemiosynthesis
the sun
they perform cellular respiration and use the glucose they create

Explanation:

Plants are autotrophs. They use the process of photosynthesis, which requires sunlight. Sunlight is converted into chemical energy (in the form of glucose) during photosynthesis. Chemosynthesis is a process used by some bacteria (not plants) to make food using chemical energy. Cellular respiration is the process by which plants (and other organisms) break down glucose to release energy, but the initial source of energy for making glucose in plants is the sun.

Answer:

The sun