PLZ HELP IM TAKING A TEST AND ITS BEING TIMED

Idon’t know how to solve this question

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

Compare and contrast the bohr model and the electron cloud models of the atom.