What is the molecular formula of these molecules (2pt)? How do these molecules differ (2pt)? Are these the same molecule (2pt)?

In some developing nations the percentage of the animal protein from fish in the diet can be as high as 25 percent.  about 85% of fish caught is used for human consumption.  the remainder is converted into fishmeal and fish oil. 

Are there any options? if so, any of them hinting at passing genes down from one generation to the next, would be your answer.