Which of the following is an example of fundamental research?

a. determining the causes of dementia in people.

b. creating robots to walk on the surface of mars.

c. colliding subatomic particles at high speeds to observe the results.

d. working with alloys to find the lightest carbon fiber composition for armor.

m=9

step-by-step explanation:

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).