Please help due at 12 am

Which statement is a proper biconditional statement for the conditional statement: if a line intersects a line segment at its midpoint, then it is a segment bisector. if a line is a segment bisector, then it intersects the line segment at its midpoint. if a line does not intersect a line segment at its midpoint, then it is not a segment bisector. a line intersects a line segment at its midpoint if, and only if, it is a segment bisector. if a line is not a segment bisector, then it does not intersect the line segment at its midpoint.

Based on what you know about the location of the earth in relation to the sun, why is this called the goldilocks zone in other galaxies?

When you imagine how you'll get from your house to the store, you are a. mental projection b. mental map c. piagetian projection d. cognitive load