Feces doesn't actually do anything; it is waste that the body doesn't need. The only thing that feces has to do is wait to be excreted.
However, feces can harbor bacteria. It can also be used as food by some animals, and it can be composted or used as fertilizer.
They don't like them
Grave
if you mean grave is in where the dead rest its : tumba if you mean grave as in "shes grave danger" its : grave but you say the "a" like "ahh" and you say the "e" like "eh"
feces
Feces.
grave sincerity means dead serious
Feces/Faeces is the brown stuff that periodically comes out of your posterior.
That is Scottish slang, for feces.
The large intestine holds feces, but if you mean while defecating or immediately before, it is the rectum.
this is still as serious / grave / important
The grave/pantheon
solemn