Physical factors are nothing but the abiotic factors which refers to land,air,water,sunlight etc. we can say that organisms on earth cannot survive without these factors.air which contains oxygen is very precious because oxygen is the breath of our is very necessary because without it life is not possible for us. water is very useful because it indirectly provides us food in the form of fishes etc. so life is not possible without these factors and hence they help for sustenance of the habitat.

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Physical factors refer to the sun , light ,air ,soil temperature, etc 

that are very important in our daily life . with the help of sun we get energy , with the help of light we can see and with the help of air we can breathe , and the temperature feels us how the climate is weather it is cold or hot.etc
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