Why do arteries need to be thick, muscular, and elastic?
to make our bodies strong for movement
to withstand the pressure of the blood that is being pumped by the heart
to pull the blood back to the heart from all areas of the body
to withstand changes in blood temperature

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.

How many types of rock can form from the rock cycle

The picture shows a location in india that is very dry and arid. notice the tall mountains in the background; you can find high amounts of vegetation on the other side of the mountains. which statement is most likely true for this area?