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why is beach nourishment considered mostly a short-term strategy for fighting beach erosion?
it requires heavy machinery.
it takes a long time to find the materials.
it must be repeated every 5 to 7 years.
it is expensive.

Option C

Explanation:

Beach Nourishment is a process of preventing coastal erosion through addition of sediments on beach. This is not a long lasting solution and hence beach requires re-nourishment after every 2-3 years or periodically. However, finding material for re nourishment is not at all a challenge. Sand from near by areas and be dredged and pumped onto the beach. This makes it an expensive exercises.

Hence, option C is correct

what have scientists found to be the most efficient and effective way to insert new sequences into an individual? a-scientists have created genetically altered foods that release dna during digestion. b-scientists use viruses to insert specific gene sequences. c-scientists irradiate genes so that they can be absorbed through the skin.

a researcher conducts an experiment on the secretion of a particular hormone in mice. scientists inject mice with a substance that stimulates the production of the hormone. the scientists then test the levels of hormones produced by the mice. the tool used to measure the hormones consistently detects the levels at 10 points lower than the actual hormone levels in the mice. this tool makes measurements, but the measurements aren't .

explanation:

no u