D, active transport because that protein uses atp to cross channels and active transportation is the only form of movement that’s used atp to move
Sunspots are temporary phenomena on the Sun's photosphere that appear as spots darker than the surrounding areas. They are regions of reduced surface temperature caused by concentrations of magnetic field flux that inhibit convection. Sunspots usually appear in pairs of opposite magnetic polarity.
Irrigation is an artificial technology that helps to obtain water and thus recover the loss in extensive (wheat) crops.
<h3>What is irrigation?</h3>
Irrigation is a technology based on the artificial supply of water to recover crops from drought conditions.
Genetic modification may also help with drought conditions by inserting into the genome of the target species gene sequences associated with hydric stress (e.g., a protein channel to close stomata at night).
In conclusion, irrigation is an artificial technology that helps to obtain water and thus recover the loss in extensive (wheat) crops.
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Well it helped the animals and humans grow the population.