Question

A windmill’s blades move from the blowing wind. The movement of the blades represents
energy.

The visible light that allows people to see where they are going describes
energy.

Answer 1

Both sentences are close but need slight wording and accuracy fixes. Suggested rewrites plus brief explanations:

1. Original: "A windmill’s blades move from the blowing wind. The movement of the blades represents energy."
Improved: "Wind makes a windmill’s blades rotate; that rotation is mechanical (kinetic) energy, which a generator can convert into electrical energy."
Why: the wind supplies kinetic energy to the blades; the blades’ motion is mechanical energy and can be transformed into other forms.

2. Original: "The visible light that allows people to see where they are going describes energy."
Improved: "Visible light is a form of electromagnetic energy; it carries energy and lets people see by stimulating the eyes."
Why: visible light is part of the electromagnetic spectrum and transports energy—“describes energy” is not the correct phrasing.

Quick general note: energy is the capacity to do work or produce change and appears in many forms (kinetic, potential, thermal, chemical, electromagnetic, etc.) and can be converted from one form to another (e.g., wind → mechanical → electrical).