1. A system for selecting one or more features to identify one or more human activities in a human-computer interacting environment, the system comprising: a processor; a non-transitory memory coupled to the processor, wherein the processor is capable of executing a plurality of modules stored in the memory, and wherein the plurality of modules comprise: a receiving module that receives skeleton points associated with one or more humans, wherein the one or more humans perform the one or more human activities, and wherein the skeleton points comprise a plurality of position coordinates of the one or more humans; a computation module that: calculates a data variation factor for the skeleton points, wherein the data variation factor identifies a variation between two or more of the plurality of position coordinates of the one or more human, and wherein the data variation factor is indicative of a variation between the one or more humans performing one or more activities and a variation between the one or more human activities; scales the data variation factor with respect to a maximum and a minimum value and sorts the data variation factor by distance metrics in a descending order such that the skeleton point is independent of the one or more human; and computes the distance metrics by scaling first four maximum values, wherein first four maximum values correspond to five position coordinates from amongst the plurality of position coordinates; a selection module that selects a set of skeleton points from the skeleton points based on the scaled data variation factor; a feature defining module that: identifies a change in position coordinates associated with the set of skeleton points by using one or more statistical parameters, wherein the set of skeleton points defines the one or more human activity to be identified; and extracts one or more features from the set of skeleton points based on the change in the position coordinates; and an identification module to identify the one or more human activities based on the extracted one or more features.