If two organisms are in the same clade, what can you predict about their relationship?
they are not closely related.
they share a common ancestor.
they compete for resources.
one organism evolved into the other organism.

The correct answer is -

They share a common ancestor.

Explanation:

Evidences for the common descent of living organisms (that is whether they have evolved from the same ancestor) have been elucidated through phylogenetic tree.

A clade (also called monophyletic group) is considered as a group of individual organisms, with common ancestor and its descendants. It indicates a single "branch" on the phylogenetic tree (also known as "tree of life).

Therefore, two organisms belonging to the same clade share common ancestor.