<span>the activity that requires the action of a first class lever in the body is: D. nodding
First class lever refer to a lever on which the resistance exist in one one side of the fulcrum and an effort is made on the other side.
Another example of a first class lever beside nodding are: Scissors, a crowbar, or a seesaw</span>
Here I have attached a photo to help you with this:
I'd say D. It responds the same for positive or negative stress.
Answer:
Complex carbs have lots of sugar molecules bonded together in long chains and take longer to digest.
Whereas simple carbs have just one or two molecules that your body absorbs quickly.
Since complex carbs are harder to digest, they keep you full for longer and contain more nutrients.
Explanation: