The answer would be The turning point in the story. A climax is basically the best point in something. An example i think that you would understand would be in Avengers: Infinity Wars. in the beginning it was showing two brothers being attacked by a man in a gold suit with purple skin. This would be the exposition. The climax would be the big fight.
Increasing the drama
Making the character more mature on solving a situation
Decomposers break down waste in their environment for the consumers so that their environment is not littered with the waste of other animals/bacteria/plants. Also when the waste is broken down, it creates a type of fertilizer for the plants in their environment.
I think its 16maybe from what I can understand from your language
Because petroleum-based plastics like PET don't decompose the same way organic material does. Wood, grass and food scraps undergo a process known as biodegradation when they're buried, which is a fancy way of saying they're transformed by bacteria in the soil into other useful compounds.