Answer:
Aristotle's laws of motion. In Physics he states that objects fall at a speed proportional to their weight and inversely proportional to the density of the fluid they are immersed in. This is a correct approximation for objects in Earth's gravitational field moving in air or water.
They'er gnerally used as painkillers
Answer: C
Explanation: crowdsourcing is when people / organization help out an application or network therefore c is the best example of that