>usually a civilization occurs in valley river.
No saben nada!!!! You dont know anything!!!!
it usually occurs of what you think
A stone head with a grim face is most usually associated with the Olmec civilization.
The Akkadian and Sumerian civilisations 5000-3500 BCE.
Don't know but what i do know is that History is rubbish!
Convection
Photosynthesis occurs usually occurs in the leaves. It occurs where there is most chlorophyll.
Rain, thunderstorms
it usually occurs in the afternoon
exertion and rest
China
No, it is not a preposition. Usually is an adverb.