Fusing heavier elements together requires much denser and hotter conditions in a star’s core. Use this idea and the concept of gravity to explain the difference in the types of elements a 1 and 20 solar mass stars produce. (1 solar mass = low mass, 20 solar mass = high mass)

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.