46:07 Which of the following are two mechanisms for water pollution?
A. high and low
B. direct and indirect
C. lethal and nonlethal
D. harmful and innocuous

Water Pollution is defined as the increased impurity or pollutants in the water bodies. Water pollution can be caused due to many human activities and natural factors.

The correct option is:

Option B. direct and indirect

The causes of water pollution include:

1. Direct causes refer to the wastes produced from the power plants, manufacturing units, refineries, and wastewater treatment plants, which are released directly into the water bodies.

2. Indirect causes refer to the contamination or pollutants found in the soil when are discharged into the water bodies.

Thus, water pollution should be decreased and proper legislation should be followed to decrease the causes of water pollution.

To know more about water pollution, refer to the following link:

link

The two mechanisms for water pollution are called direct and indirect (option B).

Explanation:

Water pollution can have multiple causes, which have been grouped into two categories - according to their source - direct and indirect.

All these pollutants come from human activity, so there is legislation for the control and prevention of water pollution for human consumption.

Regarding other options:

    High and low,  lethal and nonlethal  or harmful and innocuous do not constitute the classification of the causes of water pollution, although they can be useful to name the effects that this type of pollution produces.

not really sure sorry just trying to get points