Organisms transport nutrients.
a. soil
b. sap
c. water
d. wind

The question says, helps organisms transport nutrients. The correct option is C. Living organisms have to transport nutrients and other molecules from one point to another. In human, blood helps to transport materials round the body system while in plants water helps to transport nutrients to different part of the plant.

Answer : romans built laws to manage the pollution which was lead by smoke produced by the factories.

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.

B.) nitrogen fixationnitrogen fixation is the process of nitrogen molecules seeping into the soil and inside plant roots and bacteria. it gives more "life" to plants