How did Kepler's work build upon the theories of Copernicus? O Kepler proved that planets move in circular orbits around the sun.
O Kepler demonstrated that more planets existed in the solar system.
O Kepler added to the theory that planets move in orbits around the sun.
O Kepler showed that gravity exists and draws objects toward one another.

C

Explanation:

Through Brahe's astronomical measurements and Kepler's own drawings of the geometrical relationship between the Sun and Mars in various parts of the planet's orbit, Kepler discovered that planets moved faster when they were closer to the Sun.

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.