17. Many scientists have argued that this point in human history marks the onset of Earth's sixth mass extinction event. What is the suspected cause of this current mass extinction?
A. Volcanoes
O B. Asteroids
O C. Ice ages
D. Humans

D.Humans

Explanation:

humans contribute to global warming

which is causing rising sea levels and climate change but we are all gonna die as soon as the sun reaches it's final stage but I don't want to scare you off this gonna happen in many many many many many years to come

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explanation:

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.