Which was Venter’s contribution to science?

discovered the existence of single-celled organisms
invented the light microscope
discovered the structure of DNA
invented a synthetic cell

J. Craig Venter's contribution to science was inventing a synthetic cell. Venter and his team at the J. Craig Venter Institute created the first synthetic cell, known as Synthia, by synthesizing an entire bacterial genome and inserting it into a recipient cell, effectively turning it into a new organism. This groundbreaking achievement has had significant implications for fields such as genetics, synthetic biology, and biotechnology.

Venter's contribution to science was inventing a synthetic cell.