In evolutionary theory, adaptation is the biological mechanism by which organisms adjust to new environments or to changes in their current environment. ... This enables better survival and reproduction compared with other members of the species, leading to evolution.
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It would have effects on humans because it would Create widespread beach and cliff erosion, damaging coastal property and infrastructure. Make flood insurance unaffordable and unviable. Lead to salt-water intrusion in coastal aquifers, accelerating corrosion of waste- and storm-water drainage systems and affecting water quality and water resources.
Independent Variable is manipulated.