At which point in the pin does the narrator decide to transform his attitude toward the situation
paragraph 1
paragraph 2
paragragh 3
paragraph 4

It seems that you have missed the necessary details which are the paragraphs on "The Pin", but anyway, I found it and here is the answer.  The point in The Pin that the narrator decides to transform his attitude toward the situation is in the paragraph 3: The narrator enjoyed his former school, which was small enough for him to earn the admiration and respect of others. However, his new school was different and he needed to get used to it.
Hope this answer helps.

The right answer is b hydrogen bonds!

An ecosystem is in a certain area and includes living and non living plus there is weather conditions and a biome is a large amount of area with similar climate.so ecosystem is based on weather and biome is based on the average climate