Two sound waves are moving through a medium at the same speed. If wave x has a greater frequency than wave y, then wave x

it cools slower in the earth meaning the crystals have more time to form than lava on the surface

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.

nucleus

would be most reasonable answer tbh