Answer:
(-2,-4)
Explanation:
The point (-2,4) is in the 2nd quadrant so when flipped over the x-axis it is then in the 3rd quadrant which means the x and y coordinates are negative. Thus, our answer is (-2,-4).
Two that I know of are a sextant, and maybe an astrolabe
The answer is C ok I hate Brainly
Answer:
By a mix of human and physical geographic evidence.
Explanation:
Civilizations can end due to natural causes. Volcanic eruptions can be devastating for people living close to it. Checking rock age and strata with any historical references could explain. Data from ice core could indicate changes in the atmosphere. A change, such as increased drought, in regions, might end up causing food shortages and the end of civilizations.
Human evidence can provide the answers too. Migration patterns may explain this, such as the Europeans arrived in the Americas. The land has a carrying capacity. Studying the population might indicate the carrying capacity was exceeded, such as Easter Island.
