Question

which is a complete sentence?
wouldnt be able to produce red blood cells without a skeleton.
the interior designer styled our living room with fashionable new decor.

Explanation:

A complete sentence must have a subject and a predicate (a verb that expresses a complete thought). The first option has a subject ("you" implied) and a predicate ("wouldn't be able to produce..."), forming a complete thought. The second option lacks a predicate to complete the idea after "with".

Answer:

Wouldn't be able to produce red blood cells without a skeleton.