According to Piaget, mathematical knowledge is primarily acquired through:

Concept

In Piaget's cognitive constructivism, learners build knowledge by coordinating their own actions and reorganising mental schemes. Logico-mathematical knowledge develops through reflective abstraction from actions and relationships, rather than through passive reception.

Application

Active interaction with the environment gives the learner opportunities to act on objects, notice relationships, and reorganise ideas. This matches Piaget's account of mathematical knowledge as actively constructed.

Contrast

• Imitation of demonstrated procedures reproduces a model supplied by another person; it does not describe the learner's construction of logical relationships.

• Reinforcement of correct responses is a behaviourist mechanism that strengthens responses through consequences.

• Verbal transmission by the teacher treats knowledge as information delivered to the learner rather than constructed through action.

Result

Therefore, the best-supported answer is active interaction with the environment.