Help please one through 5!!! Thank youuu

What element breaks down into yttrium-90?

Consider the story you just read. all but one of the choices below indicate that something is living.

What do electromagnetic waves carry? how are they produced through which media can they move? where do they transfer energy? what do they not transfer? what do mechanical waves carry? how are they produced? through which media can they move? where do they transfer energy? what do they not transfer?