Physical environment affect and limits the activities of the humans. Explanation:

The physical environment is no doubt the greatest limiting factor in the growth and development of man and his knowledge as the earlier man used to worship the nature as he did not know about the use of fire and feared the impact of the night and eclipse of the sun, that was the era of environmentalism.
Now man has masted many aspects of the physical environment but still, the physical environment has an upper hand and dominated the survival and existence of man. The impact of the physical environment can be felt as in the rise of the sea level due to the global warming.
Climate change, increase in desertification and ozone depletion, large scale drought and landscape degradation decline in the food availability and the carrying capacity of the earth. The occurrence of the natural hazards like the hurricane storms and the floods that destroy life and property.
HURRY

“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?