It is best to say that marine debris . a.
is a hazard to marine animals
b.
degrading ocean health
c.
a pervasive, global pollution problem
d.
all of the above

the awnser is d i think

human-caused climate hope this

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.