Concept:The food-making process in plants needs certain raw materials and energy; wind is not one of them.
Explanation:Photosynthesis uses water and carbon (IV) oxide as raw materials.
It requires sunlight as the energy source to convert these into glucose.
Chlorophyll in leaves traps this sunlight.
Oxygen is released as a by-product.
Wind is an environmental factor that only affects transpiration or pollination, not photosynthesis.
Plants continue making food even when there is no wind.
Therefore, wind is not necessary.
Answer:C. wind