Which of the following is an example of biotechnology?
1.using yeast to ferment foods
2.studying the rate of growth of algae
3.using a computer program to model the shape of a virus
4.adding fertilizer to crops

Probably is A/1

Explanation:

This answer because Biotechnology is a broad area of biology, involving the use of living systems and organisms to develop or make products. Depending on the tools and applications, it often overlaps with related scientific fields.