Explanation:

Infancy:
During infancy, which is the first stage of development (from birth to about 2 years old), children are not yet able to communicate verbally. However, they are naturally curious and explore their environment using their senses. They show their inquisitiveness through their actions, such as reaching for objects, touching and feeling things, and putting things in their mouth to explore them. Infants also show their curiosity by observing their surroundings and paying attention to new stimuli. They may gaze at colorful objects, follow moving objects with their eyes, and react to sounds and voices. Although they cannot express their curiosity through language, they communicate their interest and wonder through their body language and expressions.

Childhood:
In the childhood stage (from about 2 to 12 years old), children continue to be curious and inquisitive. They start to develop language skills and are able to ask questions and seek information from their parents and other caregivers. They may ask questions like "Why?" or "How?" to understand the world around them. Children at this stage are eager to learn and explore, and they often rely on their parents and teachers to provide them with answers and explanations. They may show their curiosity by actively seeking out new experiences, asking questions about their environment, and engaging in imaginative play.

Early Adolescence:
Early adolescence (from about 10 to 14 years old) is a period of significant physical, emotional, and cognitive changes. During this stage, children are becoming more independent and may start to question authority and explore their own identities. They may show curiosity by seeking out information and opinions from their peers and the media, rather than relying solely on their parents for answers. However, their curiosity is not limited to their peers; they may also continue to ask questions and seek guidance from their parents as they navigate through the challenges of adolescence.

In conclusion, the correct answer is option C, "Infancy," because infants, despite not being able to communicate verbally, show their inquisitiveness through their actions and expressions. They explore their environment using their senses and observe their surroundings with curiosity. Children in the other stages of development also demonstrate curiosity, but infants do so in a non-verbal manner.