<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>
A healthy activity there that doesn’t involve drug or alcohol use would be working out in a gym- they can socialise, raise their heartbeat, become fitter and have fun. Hope this helps!
Algebra I’m pretty sure. Hope this helps!!
Very big factors depend on what type of lifestyle you live, what type of work field your in, what type of environment you live in. Everything plays part in how healthy you are. For example. If you smoke, and you've been smoking for lets just say... what.. 20 years or so? Your probably not that healthy as you want to be or as healthy as your doctor wants you to be. Yes, some things we cant control that happen in our life times, such as diseases were born with. Like i said, everything plays a part.
