Question

a hiker pauses to take a picture or a beautiful sunset, but when she pulls out her phone, she realizes her battery is low. luckily, she is wearing a special type of knee brace that can convert the energy she generates with her legs natural stepping motion into electricity. how can the special knee brace help the hiker? it can use her legs natural stepping motion to increase her speed. it can give her strength to enjoy the natural beauty around her. it can provide the electricity needed to charge her cell phone. it can produce enough energy to keep her from getting tired.

Explanation:

Step1: Analyze the function of the special knee brace

The key information is that the brace can convert the energy from her leg's natural stepping motion into electricity.

Step2: Match with the options

• Option 1: There is no indication that it produces energy to prevent tiredness.
• Option 2: Since it converts motion energy to electricity, it can provide the electricity needed to charge her cell phone.
• Option 3: No mention of giving strength for enjoying natural beauty.
• Option 4: No indication of using leg motion to increase speed.

Answer:

It can provide the electricity needed to charge her cell phone.