Please help!! I have to fill in the blanks. I would appreciate if anyone would help, thank you!

Which term best describes the phrase “something that happens”?

Astudent looks at ocean waves coming into the beach. an ocean wave with more energy will a) have a greater height. b) have a greater period. c) travel toward the beach faster. d) strike the beach with greater frequency.

What is the magnitude of the resultant vector round your answer to the nearest tenth