Which of the following mineral characteristics refers to the quality of light reflected from a mineral's surface?

hardness

streak

cleavage

luster

Luster

A mineral is a naturally occurring inorganic compound, which have definite chemical and physical properties. It form as a result of geological process.  Luster is the physical property of mineral that refers to the reflection of light by the mineral surface. The luster of a mineral is dependent upon the surface area of mineral and the type of incident light on mineral. Metallic  minerals show more luster that is more reflection of light than non-metallic minerals.  More intense the incident light more will be the reflection.  

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.

the correct answer is 2 and 4