Sarah is in her forties. her menstrual cycle is irregular and she is experiencing "hot flashes" that are keeping her awake at night. the changes sarah is experiencing are called

The changes that Sarah is experiencing is climacteric because the changes that she is experiencing are all physical and this happens when she is to undergo menopause. That is why it is called climacteric, an event that is happening or simply the symptoms that she is having because of her undergoing to menopause.

Bulling? or do you mean bullying?

Organic -  derived from plants or animalscorrosive -  capable of destroying by a chemical action  particulate -  tiny particle that can be dispersed in a gas