Your answer would be c
hope this helps
The answer is D, reactant.
All organisms need four types of organic molecules: nucleic acids, proteins, carbohydrates and lipids; life cannot exist if any of these molecules are missing.
Gravity is nest described as the attractive force that acts between any two objects on earth
Explanation:-
- Gravity was found by Sir Eizak Newton
- It has formula given by

Answer:
COCl species is an intermediate in the mechanism.
Explanation:
Intermediates are those chemical species which only appears for a short time in a course of a chemical reaction. They act as product and reactant during the reaction. Also they do not appear in overall chemical reaction.
Step 1:
Step 2: 
Step 3: 
Overall reaction :

As we can see that all the chemicals are present in the overall reaction beside COCl.
COCl species is an intermediate in the mechanism.