Activism, in a general sense, can be described as involvement in action to bring about change, be it social, political, environmental, or other change. This action is in support of or opposition to one side of a controversial argument.
There are many different forms of activism; a select list follows.
... to pass urine to the outside, and also a reproductive function in the male, as a passage for sperm.
The external urethral sphincter is the skeletal muscle that ...