The San Marcos salamander, Eurycea nana, is a light reddish-brown translucent salamander about 2-5 cm in length. E. nana is found only in
Spring Lake and a portion of the San Marcos River.
Which human activity would most likely decrease the ability of the
salamanders to survive?

The addition of a new food source into the river that limits competition for
resources

Tourism that helps fund the educational programs related to river ecosystem
conservation

Public transportation that reduces the number of automobiles that contribute to
pollution runoff into the river

Increasing water consumption that decreases the flow of clean water from the
springs that feed the river

Increasing water consumption that decreases the flow of clean water from the

springs that feed the river

Explanation: Because the salamanders have less clean water, pollution becomes more of a problem, also all of the other options would help the salamanders.

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

because the light is a great source of energy for the plants to survive. (i hope this )