How can an individual make a difference during wartime?

Read this sentence from the story of my life by helen keller. the most important day i remember in all my life is the one on which my teacher, anne mansfield sullivan, came to me. which element of plot does this sentence best represent?

Demonstrating understanding of jem's development one way to demonstrate understanding of character and theme is by writing from the perspective of a character. for this assignment, compose a short poem from the perspective of jem. your poem should detail his feelings about either a. his father, atticus or b. mrs. dubose. the poem must accurately trace the progression of jem's attitudes and beliefs, highlighting the important events and shifts in his perspective detailed above. your writing should also sound like jem, using voice and word choice that reflects the voice and word choice found in the novel. the poem can be a free poem (meaning it does not need to rhyme or follow a particular format). it should be a minimum of twenty-lines in length, have a title, and follow conventional rules of spelling, grammar, and punctuation.

What is a mechanism by which organisms maintain homeostasis when the level of one substance influences the level of another substance or the activity of an organ.