Answer is: Petrochemical production
<span>He meant the micro-organisms (microbes) are very small living organisms but plays an important role in maintaining life on earth. Microbes fix gases and break down animal matter and dead plants into simpler substances that are used at the beginning of the food chain. Pasteur shows that vaccines against infectious diseases can be manufactured. </span>
Answer:
nuclear fusion
Explanation:
When the density and temperature at the core of the gravitationally collapsing nebula reaches values when nuclear fusion is triggered and sustained, that marks the birth of the star.
Hundreds of years ago, explorers often died of scurvy. This bone-related disease be prevented by C) supplementing the diet with fresh fruit rich in vitamin C. Vitamin C is essential for the production of collagen which is found in bones and connective tissue. A lack of vitamin C can lead to a lack of collagen, leading to symptoms like gum disease, weakness, and bone pain.
