Acollection of data elements.

a-an array

b-a cluster

c-a bundle

d-a local variable

b)A Cluster

Explanation: Cluster is the collection of group that contains the data elements.The separation of cluster is based on the function of dissimilarity or distance.If the functions are of different types then they persist dissimilarity otherwise same function have zero dissimilarity.

Other options are incorrect because array is series of string,bundle is collection of software programs and local variable is a variable that can only work in the defined function and program and not outside the program.Thus, the correct option is option(b).

answer; receiver;