Slavery
The formation of numerous, closely spaced rills due to the uneven removal of surface soil by streamlets of running water. Also known as rilling; rill wash; rillwork.
A headace is cause by a boy named hasan alabaca. he is so dumb and lound.:]
Proximate: What triggered the immediate response of an animal? Ultimate: how did it benefit the species?
5/5/4/4 = 0.0625