Option c would be the most befitting one.
4, The grain size would be sand, and the rock name would be sand stone.
Answer:
Disadvantages of Exports
Fluctuation in foreign exchange rate. ...
Economic conditions in importing country. ...
Political conditions in importing country. ...
Change in regulation in importing country. ...
Rivalry between nations. ...
Socio barriers. ...
Higher working capital requirement. ...
Credit risk.
Basalt is the rock that makes up a majority of the oceans floor!