Concept:Mathematical tools encompass all resources that help in learning and doing mathematics—including language, symbols, and instructions—not just physical objects.
Explanation:Option B gives the most inclusive definition.
It covers language, written symbols, and meaningful instructions used to establish purpose.
Options A, C, and D list only specific physical items (e.g., calculators, geo-boards, charts).
These are part of mathematical tools but do not represent the complete scope.
Therefore, the broadest and most accurate choice is option B.
Answer:B. All types of materials including language, written symbols, meaningful instructions to establish their purpose.