In my JLPT prep workbook, there is a practice sentence that I don’t understand.
The fill-in-the-blank sentence is:
ジムさんは_________が高いです。
The correct answer is " せい", but I don’t understand why that is correct. I imagine it is because this sentence is using vocabulary I haven’t learned yet.
Can anyone explain “せい” to me in the context of this sentence?