Sexual selection often results in the development of secondary sexual characteristics, which help to maximize a species ‘ reproductive success, but do not provide any survival benefits. The handicap principle states that only the best males survive the risks from traits that may actually be detrimental to a species; therefore, they are more .
It's because seawater isn't good for planting crops. It destroys crop because of it's salinity. Therefore the seawater irrigation kills the plants while the light irrigation produces few beans. Because the farmer captures rain water in special traps.
