The world is round not flat cause first look image your viewing a picture of earth actually the earth is not really round its a shape called an ellipsoid which is kind of squatters and fat plus the world is round cause of the force of gravity
Explanation:
Olivine -
It is the primary component of the upper layer of mantle , Olivine is one of the common mineral present on the subsurface of Earth .
The structure of olivine is neosilicate . The general formula is
( Mg²⁺ , Fe²⁺ )₂SiO₄
It has an independent unit of SiO₄ , which is independent , having a tetrahedral structure .
If there are bodies of water and land to cultivate nearby then that is a good situation for agriculture to take place so that there is where to plant and also a source of water to keep the plants alive and growing. Where human beings find such a geographic situation, say like along the Nile River then a class of small farmers can develop and this is a social stratum.
He has been building reclaimed islands
I think the answer is D:all of the above.
