3 Answers

No they do not choose to be gay as arryoudini explained you can not help you who you fall in love with! wether it be the same sex or oppisit sex

Many deliberately cultivate this life style.

Some claim it is because of sexual abuse either children or later in adult life.There are  few who's gentiles are malformed at birth.

Like any bad habit it is hard to get rid of, but the good news is that many have been able to correct themselves. Like smoking or addiction,  when your really hooked it is hard to quit.

The realization that our Creator regards it a gross sin has been enough both to deter and overcome the problem. See Romans 1:18 & 1Cor : 6 9-11

Hope that is clear!

I think some are born that way, without choice.

Some it's a matter of preference,

Others out of abuse.

it seems today to be on the rise out of popularity, and experimentation.

I don't believe there is only one answer.