Answer:
c. maturation
Step-by-step explanation:
Maturation -
It refers to the steps in which the young infant develops and grows up , is referred to as maturation .
The steps of maturation , require certain time period , as when the child will start to crawl , walk , read , speak etc .
Some children tends to learn these things in a faster rate and some may take more time , all depends on the food , parents and on genes .
Hence , from the given scenario of the question ,
The correct option is c. maturation .