As the human population continues to grow, use technology, and consume resources, they often modify the ecosystems around them. In which of the following ways can humans counteract negative influences they might have on the environment?

the correct answer is b

correct answer is a. and d.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.