Answer:
The answer is C. Wind levels usually remain static in a specific location, so any existing life is not affected much. Biomass contributes to growth as it enriches the soil. Solar (assuming it's referring to the widespread increase in the use of solar energy) could actually be indirectly beneficial to forests. Nuclear fission, however, can cause harm to plants. Some known effects on plant life include stunted growth, reduced germination, and genetic mutations in addition to the direct burning that could be inflicted on plants in some cases.