Jamieson, Fausset and Brown on Genesis 2:20

20. but for Adam there was not found an help meet for him--The design of this singular scene was to show him that none of the living creatures he saw were on an equal footing with himself, and that while each class came with its mate of the same nature, form, and habits, he alone had no companion. Besides, in giving names to them he was led to exercise his powers of speech and to prepare for social intercourse with his partner, a creature yet to be formed.