The emergence of seedlings through soil is an example of negative response to-- A. Magnetism B. Gravity C. Illumination D. Friction

The answer is option  C "Illumination"

Explanation:

Illumination can simply mean how light can be used in the process of achieving a predefined target or something.

As seedlings are planted in the soil, after the seeds most have spend the required number of days required for germination, it follows it natural cause by beginning to germinate towards the atmosphere and this illustrates a negative response to illumination.

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