Question

which option shows how chemistry is beneficial to our lives?
scratching a bug bite
writing with a pencil
using batteries
choosing a wall color

Explanation:

• Scratching a bug bite is a physical action related to relieving itch, not a chemistry - related benefit.
• Writing with a pencil involves the physical process of graphite marking on paper, with the chemistry of graphite being more about its structure for writing, but it's not a direct beneficial application of chemistry in a daily - life - enhancing way like energy storage.
• Using batteries: Batteries work based on electrochemical reactions (chemical reactions that involve the transfer of electrons) to store and provide electrical energy. This is a clear example of how chemistry (electrochemistry) benefits our lives by powering devices like remote controls, flashlights, etc.
• Choosing a wall color is related to aesthetics and personal preference, not a direct application of chemistry's benefits.

Answer:

C. using batteries