The part of the earth’s crust that is covered by oceans and seas is called? by Sunday | Jun 14 | Geography WAEC | 0 comments A. biosphere B. hydrosphere C. ionosphere D. stratosphere Correct Answer: Option B – hydrosphere Users Also Read These:A serious environmental hazard which causes both…The degree of saltiness or concentration of salt…The layer of earth found immediately beneath the…The earth is four times the size of the moon and the…Th earth's crust consists essentially of?