The is a poem is not the author

mood
rhythm
meter
speaker

(i'm think its mood, but i just want to be sure. this is meant for english, i forgot to put the subject s it did it for me xd)

Amutagen is 1: a living thing that has undergone a mutation. 2: an agent that causes a mutation in dna. 3: a mutation that has affected one gene. 4: a chemical that can poison living cells.

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Isolated volcanic peaks on the ocean floor are