The embryo, endosperm and seed coat.
I feel the same I'm so dumb
Earths lithospere is solid and sits on top of the softer asthenosphere.
At the time of this writing, the most recently available statistics pertain to 2010, at which point the World Bank reported that about 37.7 percent of the world's total land area was considered agricultural land, while approximately 10.6 percent was considered arable.