Which of the following choices is an accurate example of how the use of cultural tools is important in the development of one’s cognitive developmental process?

An abacus is a cultural tool: a learned, human-made aid that can support thinking and problem-solving. Using it to work through a mathematical equation provides a concrete way to represent quantities and relationships, helping develop mathematical reasoning. So the best answer is “The use of an abacus to solve a mathematical equation is useful in helping the brain form a mental picture of the problem.”

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