The word “cumulative” means that something builds on itself. which example best shows how scientific knowledge is cumulative?

watson and crick worked together to come up with the model of dna.
kepler based his laws of planetary motions off of newton’s law of gravity.
hardy and weinberg independently came up with a population equation.
darwin and his grandfather both worked on the ideas of survivability.

Kepler based his laws of planetary motions off of Newton’s law of gravity.

Explanation:

As the statement tells us, cumulative means that something gets bigger, by succesive additions. For scientific knowledge, this would mean that new knowledge is built upon laws or theories that were already stated before.

For example, Newton established his law of gravity, then, years later, Kepler established his laws of planetary motions, using principles that Newton wrote in his law of gravity.