At what age does an infant's birth weight triple?

The correct answer is Choice D: 4 times the birth weight.

Choice A rationale:

A toddler at this age is expected to have a weight gain that results in being about 4 times their birth weight, so 2.5 times is less than expected.

Choice B rationale:

While 3 times the birth weight indicates significant growth, it is still not the typical expected weight gain for a 3-year-old.

Choice C rationale:

Doubling the birth weight is expected within the first few months of life, not at 3 years old.

Choice D rationale:

By the age of 3, children are generally expected to weigh about four times their birth weight, reflecting normal growth and development.

Choice A rationale:

Parallel play is a stage of play commonly seen in toddlers and young children. During parallel play, children play alongside each other, engaging in similar activities, but they do not interact directly with one another. In this scenario, where the toddlers are playing with dolls side by side without interacting, it aligns with the characteristics of parallel play. This type of play is a normal developmental stage and helps children learn from each other and develop social skills.

Choice B rationale:

Solitary play refers to a type of play where a child plays alone without interacting with others. In this case, the children are not playing alone; they are playing alongside each other, making solitary play an incorrect choice.

Choice C rationale:

Cooperative play involves children playing together in a group with a common goal or activity, such as building a sandcastle together. In this scenario, the children are not collaborating on a common task; they are playing individually alongside each other. Therefore, cooperative play is not the correct choice.

Choice D rationale:

Associative play occurs when children play alongside each other and interact with one another but do not have a shared goal or activity. Since the children in this scenario are not interacting with each other, associative play is not the correct choice.