The answer is usefulness and profitability. An ore is a mineral or aggregate of minerals known as ore deposit and this can be mined or extracted like a metal. Hope this is the answer and would be of big help.
A good index fossil is one with four characteristics: it is distinctive, widespread, abundant, and limited in geologic time. Because most fossil-bearing rocks formed in the ocean, the major index fossils are marine organisms
Explanation:
The pancreas produces lipase during digestion. This enzyme helps the intestines to break down fats.
