Question

two planes intersect in a ____. o line o ray o point o line segment

Explanation:

In geometry (a subfield of Mathematics), when two planes intersect, their intersection is a line. A point is too small (two planes intersecting at a point would be a special case, but generally, the intersection is a line), a ray has one endpoint (not the case for plane intersection), and a line segment has two endpoints (planes intersect in an infinite set of points forming a line, not a segment). So the correct answer is line.

Answer:

A. line