hello aspirant,

Engineering does not requires biology as a subject at any level of the career.

if there's an option for you to choose one among biology or tamil as a subject, and if you want to make a decision keeping your engineering career in mind, I would guide you to take tamil because that can help you maybe somewhere in engineering .

Biology won't help you anywhere in engineering.

If you think, your question was not answered properly, you can get back to us again with your questions

Hope that helps

All the best.