The activity of ordering different items, such as sticks, in order of length is known as

Seriation

Explanation:

Seriation  is defined as technique through which element, items or objects are classified and place in a particular order based on the subject.Items ca be classified on the basis of size, shape, capacity, color etc.It is considered as the stage of development that occurs step by step usually in children.

According to the question,ordering of things are such as placement of sticks according to their particular length is the example of serration.

what are the choices? the multiple choices?

i will answer in the comments after the choices have been said.

i would say b. research typically uses a variety of sources