Which factor do trees need when they compete for energy soil
sunlight
space
ability to reproduce

Sunlight

Explanation:

Sunlight is the form of energy that trees use to complete the process of photosynthesis. In order for a tree to convert carbon dioxide and water into sugars (and other carbohydrates), it needs energy from the sun. The crown of a tree collects sunlight.

meteorologists would compare a new weather map with one 24 h old to see how fast a front is moving.