This search algorithm steps sequentially through an array, comparing each item with the search value.

a. sequential search
b. binary search
c. natural order search
d. selection search

a) Sequential search

Explanation:

Sequential search  is the linear searching technique that is used for identifying any particular value in the list . Mechanism of sequential search is carried through comparing and checking each element of the list till the matching element is found .

In some case if the list does not has that element is found by complete searching.It is also known as linear searching.

Other options are incorrect because binary search is logarithmic searching technique.Natural order search is searching in alphabetical order.Selection sorting is the sorting of element with in-place mechanism.

Thus, the correct option is option(a).