Which of the following affect the air column and the sea surface but not the water column or the seafloor? artifical reefscommercial shipping lanesoil rigswind turbines

Wind Turbines

Explanation:

A wind turbine is a device which is used to transform the kinetic energy from wind into electrical energy. It is useful in generating electrical energy from an alternative renewable source of energy that is wind. It is affected by the speed of the air currents.

A wind turbine efficiency is affected by the air column and the sea surface but it is not affected by the water column or the seafloor.

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.

what is this saying?