Which best explains a way of protecting water for human consumption? A Reduce the use on lakes and rivers for irrigation of crops.
B. Ban the use of lakes and rivers for recreation.
C Allow dumping of some waste into lakes and rivers.
D Improve water quality standards for industries located on lakes and rivers.

Improve water quality standards for industries located on lakes and rivers

Explanation:

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.