Question

what is an example of an exothermic reactions?
combustion
melting ice
photosynthesis
rewatch

Explanation:

To determine the example of an exothermic reaction, we analyze each option:

• Combustion: Reactions like burning fuel release heat, so it's exothermic.
• Melting ice: This is a phase change (solid to liquid) that absorbs heat (endothermic).
• Photosynthesis: Plants absorb energy from sunlight to make glucose, so it's endothermic.

So combustion is an exothermic reaction.

Answer:

A. combustion