What process occurs when all of the energy from light waves is transferred to a medium?
a.
transparency
b.
refraction
c.
metamorphosis
d.
absorption

The right answer is D

When light spreads in a medium (air, water, glass ...), it interacts with it. The latter modifies the properties of light. He can change his speed, take energy from him (rarer, give him some).

The luminous intensity can decrease in the mediums. This is the phenomenon of absorption (example: sunglasses). It can also grow in amplifying media. These media are used in lasers.

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.