Which of the following would be a valid hypothesis for a controlled
experiment investigating a person's ecological footprint?
A. Increasing the amount of waste you produce is a selfish behavior.
O
B. What effect does increasing the amount of waste produced have
on one's ecological footprint?
O
C. Increasing the amount of waste you produce will increase your
ecological footprint.
O
D. Why is it important to know your ecological footprint?

velocity and height

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.

more words for this could be abiotic and biotic

abiotic: living organisms within an ecosystem

biotic: non-living organisms within an ecosystem