What role does the inorganic component play in composite materials?

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Enhancing the material's mechanical durabilityLowering the thermal expansion rateMinimizing shrinkage during polymerizationAll of the mentioned effects

Explanation

The inorganic phase in composites contributes to multiple improvements: it boosts mechanical strength, reduces the coefficient of thermal expansion, and decreases polymerization shrinkage. Therefore, all the listed benefits are provided by the inorganic phase.