Question

is the group of words in bold a phrase or a clause? the earth is not a perfect sphere but rather an oblate sphere because it is flattened at the poles and enlarged at the equator. phrase clause submit

Explanation:

A clause contains a subject and a predicate (a verb and its related information). The bolded group "because it is flattened at the poles and enlarged at the equator" has a subject ("it") and predicates ("is flattened", "is enlarged"), so it is a clause. A phrase lacks a subject - predicate structure.

Answer:

clause