When looking into a shop window on a bright sunny day you see an image that is a mixture of your image and the items on display. The principles of light involved are
reflection and absorption
refraction and absorption
refraction and transmission
reflection and transmission

D

Explanation:

because it is reflecting off the window and traveling through.

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.