My baby sister by a. gautam fresh like morning dew on a new leaf that has just sprung after the longest winter she rests on the leaf of the blanket —pink as her soft cheeks and blossoms in her sleep unaware of the world that has turned upside down because of her and only for her the author's tone in this poem can be best described as a. confused. b. apathetic. c. humorous. d. sentimental.

D. Sentimental

The author is talking about the way that spring finally came and how the girl rests "unaware that the world has turned upside down". That conveys a sort of sadness and nostalgia for this event in time.

Hope this helps :)

The reason is not logically sound, because the writer does not include strong factual evidence.

Explanation:

Even though the writer suggests what should be done about construction of landfills and describes their potential risks (totally valid), he/she does not directly provide with factual evidence that can demonstrate the link between his/her uncle disease and the landfill. This argument is based just on assumptions.