Which of the following options is a classification for an arc? select all that apply. minor arc acute arc major arc semi-circle obtuse arc

The answer for the quesion shown above is: minor arc, major arc and semi-circle.
 By definition, an arc is a part or a portion of a circle.
 Imagine two points lying on a circle, the  shortest portion between these two point is called the "minor arc" because is the shortest; and the rest of the portion is called the "major arc", because is the longest. 
 A semi-cicle is the half of a circle.