In the given question we are asked to pick what described line GI.
Explanation
In the question, we are given four possible options which are
1) Perpendicular bisector of FH
2) Angle bisector of G
3) Median of triangle FGH
4) Altitude of triangle FGH
Considering options 1. 2, 3, we should note that the trio of options will require a confirmation that angle G is truly bisected by GI. Since there is no indication of that on the image, it implies that the only accurate option is
Answer: Altitude of triangle FGH
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