I get it!
a. carbohydrates - glycogen or starch (these are sugars)
b. proteins - hemoglobin or enzyme (these are examples of proteins)
c. lipids - cholesterol or fat
d. nucleic acids - DNA or RNA
A frog is an amphibian so it survive both on land and water
Hope this helps:)
I think it B. but I don't know if its correct or not.
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I see you got this from k12 too.
The anserto this would be c, becuase it the most realistic and will work the best without tons of money being spent. also, farmers will be mor elikely to comply if they are encouraged not forced