Some fishing boats run streamers to buoys that trail 150 feet or so from the boat to deter birds. What is this designed to do? They prevent high concentrations of sea birds from trailing boats and defecating in the water, reducing water quality. They prevent sea birds from being tangled or caught by fishing line. They prevent sea birds from eating the fishing catch. They prevent sea birds from being too close, reducing the potential that they will be harmed when fish are thrown back.

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.

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation: