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:The liquid portion of the earth’s crust is called?The layer of earth found immediately beneath the…The most important element on the earth's crust is?Which of the following landforms may occur when…The most abundant element on the earth's crust is?