What did hararl mean when he says, “the fact is that a jumbo brain is a jumbo brain on the body”?

Ray lo bisects nlm, lm=18, no=4, and ln=10. what is the value of x?

The great scientist alfred wegener proposed that continents have moved, while other scientists such as t.c.chamberlin argued against wegener. wegener's ideas eventually won, and are now widely accepted, because: a) wegener's ideas were more beautiful, and so were favored by the intellectual elite.b) wegener's ideas did a better job of predicting the results of new observations and experiments.c) wegener's ideas appealed to dead white european males, whereas chamberlin's didn't.d) wegener's ideas appalled dead white european males, and we all know that in this politically correct era,dead white european males cannot get a fair shake.e) wegener won the nobel prize.

Can someone me with this plz? ! i'm putting 20 points on it!