A group goes vertically and a period goes horizontally.
(a group goes down and a period goes across)
Nitrogen is crucial to the marine life and it is disappearing because it cannot be assimilated by most organisms in the water.
I think it’s A but I’m not sure.
Religion and science are fundamentally incompatible. They disagree profoundly on how we obtain knowledge of the world. Science is based observation and reasoning from observation. Religion assumes that human beings can access a deeper level of information that is not available by either observation or reason.
