It might be said that the first lesson of the poem is to float on one´s back (option A) It seems that a father is teaching his daughter to swim on her back. This can be inferred by the use of certain words such as "Lie back daughter" "spread your arms wide". It also might be understood that the lesson is deep that that, It might suggest a father letting her daughter go, letting her be because she is going to be safe.
Gram is much smaller than kilogram, and a kilogram is much too big to fit in a pen cap! Your answer is grams.
I would love to help but I am not good with analysis but you should read the poem if you haven't already because it is good :-)
Answer:
Pulls out a gun or a reverse card :)
Explanation:
