Question

What is the energy source plants use to produce high energy sugars?

Answer 1

The sun (light energy).

Explanation:

This process is called photosynthesis and the production of sugar is specifically in the light independent part of photosynthesis called the Calvin cycle.

In the Calvin cycle, `CO_2` is converted to sugar using the enzyme RuBisCo, ATP, and NADPH. The ATP and NADPH are products from the light dependent part of photosynthesis.

Here's a diagram of the Calvin cycle: