What Walks On Four Legs In The Morning, Two In The Afternoon And Three In The Evening?

A human being walks on four legs in the morning, two in the afternoon and three in the evening. Figuratively speaking, the morning refers to the stage in a person's life between the day he or she is born and the day he begins to walk. Before a child starts walking, he or she is unsteady and takes baby steps, which is basically known as crawling. The word crawling is defined as the action of moving on all four legs (or in human beings, moving using both their hands and feet.)

The afternoon refers to the period between the time a person learns to walk properly on his or her two feet and the time when he or she is old and his or her movements become unsteady. That is the time a person uses two feet to walk. The evening refers to a person's old age, just prior to the time he or she dies. Older people use their two feet and a third foot, namely a walking stick, for the purpose of walking.

A person

People

What animal walks in the morning on four feet, in the afternoon on two feet, and in evening on three feet?

 The Sphinx is said to have guarded the entrance to the Greek city of Thebes, and to have asked a riddle of travelers to allow them passage. The answer to the riddle is human. If someone didn't get it right, the Sphinx would strangle and devour them. 

A human throughtout their life.(baby stage, child/adult stage and eldery stage)
baby crawls on all 4, adult/child walks on 2 and eldery person walks with 2 legs+a walking stick making it three.