What does oc mean internet slang? i see it all the time on funny junk, like oc this is oc, what is it? 5 stars for best answer.

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.