Which of these statements describe the correct path of a nitrogen atom through the nitrogen cycle?

a)
atmosphere, animals, plants, bacteria

b)
air, bacteria, plants, animals

c)
animals, air, bacteria, plants

d)
bacteria, air, animals, plants

The correct path of events that take place in a nitrogen cycle is air, bacteria, plants and animals.

Option B

Explanation:

Nitrogen forms the major proportion of air. The nitrogen in the atmosphere cannot be used as such by plants and animals. Thereby the atmospheric nitrogen is fixed in the soil by means of nitrogen fixing bacteria, these nitrogen fixing bacteria live in the root nodules of leguminous plants.

They maintain a symbiotic relation with plants through which they provide nitrogen to the plants. The animals take this fixed nitrogen from plants.

true is the answer : )

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.