Pls help i desperately need an answer

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.

Ineed ! i have no clue how to do this problem.

Which of the following words describe the reality that the universe looks the same from various perspective