Researchers found decline in otter populations that were living in sheltered bays.

slow

Explanation:

The sea otters are sea animals which are declining. But those found in sheltered bays do not easily decline. The otters which rarely come ashore prefer sheltered bays. These bays provide great opportunities for the otters.

Therefore, reseachers discovered that sheltered bays lead to slow decline in otters population.

The sea otter has been marked as an endangered species due to the fact that people hunt them for their fur.

the 4th option is the answer

b) the planets year length would be longer

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