Question

its possible that someday scientists will discover more animals in the sea that
explain other sea monsters.

which sentence best replaces the one above?

it is possible, though not likely, that scientists will find more
animals in the sea.

one day, scientists will discover more animals in the sea that
explain other sea monsters.

its possible that someday scientists will discover more animals
that fit the description of sea monsters.

one day, scientists may find even more sea creatures that fit the
description of sea monsters.

Explanation:

We need to find a sentence that best replaces the original one. The original sentence says it's possible scientists will discover more sea animals to explain other sea monsters. Let's analyze each option:

• First option: Adds "though not likely" which isn't in the original, so incorrect.
• Second option: Changes "possible" to a definite "will", which alters the meaning, so incorrect.
• Third option: Talks about animals fitting the description of sea monsters, but the original is about explaining other sea monsters, so not a match.
• Fourth option: "One day, scientists may find even more sea creatures that fit the description of sea monsters" - "may" keeps the possibility, "sea creatures" is similar to "animals in the sea", and "fit the description of sea monsters" is a rephrasing of "explain other sea monsters" (since discovering such creatures could explain the idea of sea monsters). It maintains the meaning of the original sentence about possible future discovery of sea - related creatures related to sea monsters.

Answer:

D. One day, scientists may find even more sea creatures that fit the description of sea monsters.