Good job!  One way or another, you got here by getting the last question right.  The main animal of sacrifice was a spotless lamb, and this spotless lamb was a picture for Israel, looking forward to…?

-When Israel would be spotless, rid of the Canaanite presence-

-Wrong!  It was looking back to remember God covering Adam and Eve-

-It was looking forward to Jesus, the Lamb of God who took away the sin of the world with His blood!  Woo!!-

-There wasn’t a specific picture.  It was just a sheep that died.  End of story.-