What is astronomy? Why is the study of astronomy important to humans?

Astronomy is the branch of science which deals with celestial objects, space, and the physical universe as a whole. Astronomy helps us study how to prolong the survival of our species.

Answer and Explanation:: Astronomy is the study space and what it contains. Astronomy should be studied by mankind because our survival is directly linked to the cosmos.  The Earth is heated by its nearest star, the Sun, and its ocean tides are directly connected to its only satellite, the Moon.  

C. Adding a catalyst

Explanation:

Because the catalyst increases the rate of chemical reaction