16. The lateral-line of a shark is used for
A. Detecting and locating objects and moving animals in the water
B. Excretion of urea and water
C. Detecting odors
D. Secreting mucus as a swimming lubricant

A. Detecting and locating objects and moving animals in the water

Explanation:

The lateral lines are present in most fish and are situated under the  subcutaneous skin, which is present on either side of the shark. The lateral lines  serve a very important function to the fish, among the functions of the lateral line are

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

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answer: collecting information/data

reason: the student is going around and asking people questions to collect data

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