Step 1: Understanding the Concept:
Children aged between two and three years walk with short, unsteady steps. A special word is used for this stage, and it comes from the way they toddle along.
Step 2: Check option (1), Toddler.
Toddler is the word for a child learning to walk, with the unsteady jumpy gait of that age. It matches the clue about walking. So option (1) is TRUE.
Step 3: Check option (2), Infant.
Infant is used for a child in the first year of life, who mostly cannot walk yet. So option (2) is FALSE.
Step 4: Check option (3), Teenager.
Teenager is a young person aged between thirteen and nineteen. It has nothing to do with a jumpy walk. So option (3) is FALSE.
Step 5: Check option (4), Adolescent.
Adolescent is also a teenage stage, linked to puberty. The age is far above three years. So option (4) is FALSE.
Final Answer:
The child of two to three years is called a toddler, so the answer is option (1).