Answer: One-year-old baby Jesse could not walk two months ago, but now he can.
Explanation:
Maturation is known to be the procedure through which an individual go through natural development in size, physical growth and so on. This process starts from childhood when an individual is born till death. For example, during childhood it occurs when a child is growing up. Thus, a child who does what he or she cannot do before is passing through the process of maturation.
One-year-old baby Jesse could not walk two months ago, but now he can is an example of maturation.