A food chain represents:

O The flow of nutrients throughout an ecosystem.
O A model of energy flow through one pathway in an ecosystem.
O A model of energy flow through all parts of an ecosystem.
O The recycling of nutrients in an ecosystem.
WILL MARK BRAINLIEST!!

segmentation=endoskeleton=backbone=coelom=tissues

age range would be the answer

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.

i wish i could with all of them i can barley see the first one so here's the answer to the first one b