Question

[1] It amazes me that a week ago, only seven days prior to the big event, I was so worried that my camp presentation on conservation would be a big flop. [2] A teacher once told me that if you grab the audience’s attention at the very beginning, they’ll be hooked. [3] She was right. [4] I began my presentation by showing how a solar cell and a simple wire powered by the sun could use the sun’s powerful rays to make a fan spin.

What is the best revision of sentence 4?

I began my presentation by showing how a solar cell and a wire could use the sun’s rays to make a fan spin.

I began by using a solar cell and a simple wire powered by the sun’s rays to use the sun’s power and make a fan spin.

Using a simple wire and a solar cell, I began by showing how to use the sun’s powerful rays to make a fan spin.

Answer 1

"I began my presentation by showing how a solar cell and a wire could use the sun’s rays to make a fan spin."

Reason: This version is concise and clear, removes redundant phrasing ("powered by the sun"/"use the sun’s powerful rays"), and avoids awkward construction.