With so much emphasis on “blood sacrifices,” why was provision made for a grain offering?

With so much emphasis on “blood sacrifices,” why was provision made for a grain offering (Leviticus 2:1-16; 6:14-18)?

The grain offering was presented as a gift, an act of worship rather than restitution for sin. The grain offerings were offerings of fine flour or of unleavened bread, cakes, wafers, or of ears of grain (2:1, 4, 13-14; 5:11) Although the poor could mix grain with an animal sacrifice as a substitute sin offering (Leviticus 5:11), the grain offering itself was probably intended simply to remember God’s favor and, by remembering, to please him (an aroma pleasing to the Lord).

–The Quest Study Bible and NIV Commentary