The movement of a plant part toward or away from a source of heat is called
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Metamotropism
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Monomotropism
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Thermotropism
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Theomotropism
C
Correct answer
Explanation
Thermotropism is the directional growth or movement response of plants to temperature or heat stimuli. The prefix 'thermo-' refers to heat. Plants may grow toward or away from heat sources depending on the species and conditions. 'Metamotropism' and 'Monomotropism' are not valid biological terms. 'Theomotropism' appears to be a fabricated distractor.