A strike in softball is when a pitcher pitches a softball to the batter [located in the batter box in front of the catcher] and the batter misses. When it is a strike, it is thrown in a particular area from the batter's armpits to the bottom of their knees.
It is a term to identify the next batter in the line up after the current batter.
A runner doesn't get a strike, a batter does.
Lead off batter or the first batter to start off the teams turn at bat.
It provides better visibility for the batter.
In softball yes.. if first base is not occupied.... but it depends on baseball and softball and what leval you play at
The distance between the pitcher and the batter should be around 30 feet.