선택하다 is probably the most common word, but there are many related words used for different contexts. * to choose = 선택하다 / 택하다 / 고르다. * to pick = 고르다 / 찍다 (slangy) / 선택하다. * to elect = 선출하다 (by vote or consensus), 뽑다 (colloquial word for 선출하다), 선택하다, 택하다. 고르다 often means picking/selecting one or multiple out of many, while the others are more commonly for choosing one from a few.

안녕하세요. :) "고르다" is used the most for "to choose and to pick". "뽑다" is for "hand-picked". "선출하다" is for "to elect" *당선되다 to be elected