Which statement best describes the purpose of earth's spheres? they work together as open systems to cycle matter through ecosystems. they work independently as closed systems to cycle matter through ecosystems. they work together as open systems to move matter to living and nonliving parts of earth. they work independently as closed systems to move nutrients to living and nonliving parts of earth.

“dear sir: it is with great reluctance, i trouble you on a subject, which does not fall within your province; but it is a subject that occasions me more distress, than i have felt, since the commencement of the war; and which loudly demands the most zealous exertions of every person of weight and authority, who is interested in the success of our affairs. i mean the present dreadful situation of the army for want of provisions, and the miserable prospects before us, with respect to futurity. it is more alarming than you will probably conceive, for, to form a just idea, it were necessary to be on the spot. for some days past, there has been little less, than a famine in camp. a part of the army has been a week, without any kind of flesh, and the rest for three or four days. naked and starving as they are, we cannot enough admire the incomparable patience and fidelity of the soldiery, that they have not been ere this excited by their sufferings, to a general mutiny or dispersion. strong symptoms, however, discontent have appeared in particular instances; and nothing but the most acitive efforts every where can long avert so shocking a catastrophe.” what’s the central idea?

True or false: the eastern roman empire lasted for 1,000 years longer than the western roman empire.

Which of the following variables has the strongest influence on the variations found in american family life? a. race and ethnicity b. religious affiliation c. social class and culture d. education and occupation