Given a scientific question, generate a correct answer to it.

Ex Input:
Where do lancelets live?

Ex Output:
shallow ocean water

Ex Input:
Amphibian larvae go through what process to change into the adult form?

Ex Output:
metamorphosis

Ex Input:
Whan an alkene is aquired by an alkyl halide in an organic reaction, what kind of reaction is this?

Ex Output:
elimination