A growing human population causes added pollution. Experts say that an overload of nitrogen and phosphorus are responsible for coastal pollution. This pollution is caused by agricultural runoff, erosion, and... A. untreated or partially treated sewage. B. motorboats. C. litter such as aluminum cans. D. growing marine life populations.

relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

hope this .. .

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

the answer will be a) proteins i believe

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus