In genetic drift, the allele frequencies in a gene pool change because of
a. mutations.
b. chance.
c. natural selection.
d. genetic equilibrium.

Answer = Chance So, the answer choice is B.

The infrared (ir) and the ultraviolet(uv) represent the two extremities of the visible spectrum (400-700nm). while ir represents electromagnetic radiation with wavelengths longer than those of visible light, uv represents wavelengths shorter than visible light

Ithink that b is correct but just in case wait to see if someone else answers