The in the mouth secrete enzymes which prepare the food for digestion in the stomach.
a. teeth
b. tongue
c. salivary glands
d. pancreas

The salivary glands in the mouth secrete enzymes which help prepare the food for digestion in the stomach.

salivary glands

Explanation:

this is the correction i got 100% correct

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).