Answer:
A. Weather.
Explanation:
Usually or average are terms that are often associated with weather conditions.
Weather is the average atmospheric conditions prevalent in a particular place over a short period of time.
When forecasting weather, predictive terms like usually are employed to denote expected weather events
Metre per second is the unit of speed ..... speed is calculated by dividing distance over the time
It's the concentration of sense organs, nervous control, etc., at the anterior end of the body, forming a head and brain, both during evolution and in the course of an embryo's development.
D i believe i’m sorry if this is not correct if not try c
He diffuses faster i have already done that lab