The term complexity refers to the number of components and the relationship among components.
Option: A
Step-by-step explanation:
Complexity describes the behaviour of a process or model whose elements communicate in various ways and follow local laws, implying that there is no logical, higher guidance to describe the various connections available.
The word is usually implemented to describe anything with several parts where those parts participate in multiple ways, resulting in a higher dimension of appearance greater than the sum of its parts.
Complexity has become a feature of our world and several scientific fields have therefore struggled with complicated systems and anomalies.