Why does the narrator refer to the other bodies of water as "a similar environment"?

seeing as no choices were provided, i'll do my best to answer it from knowledge.

job specialization promotes work ethic to the person doing the job. he/she may be strong in the arms and able to lift things, specializing him/her in a job where you lift and carry.

a marriage ending by the death of a husband or wife.

explanation:

i don't see your choices but i'm just gonna give you my answer.

the congress realized that action had to be.