The answer is b an astronomical unit
Answer:
The time span between 1680 and 1766 (lines 1 and 2) is 86 years: 1766 − 1680 = 86 years. During this time, the falls receded an average of 5.8 feet per year: 500 feet ÷ 86 years ≈ 5.8 feet per year.
The time span between 1856 and 1876 (lines 3 and 4) is 20 years: 1876 − 1856 = 20 years. During this time, the falls receded an average of 25 feet per year: 500 feet ÷ 20 years = 25 feet per year.
Explanation:
plato answer ^
C, it’s global warming . Temperatures start to rise . Oceans get warmer as well.
fracture zones allow old, oceanic crust to be subducted by continental crust.
The study of the location of fracture zones has provided evidence to support the theory of plate tectonics because <span>fracture zones are the zones where new oceanic crust is formed, allowing old oceanic crust to be subducted by continental crust, thus creating a circle in the crust that is a piece of evidence in support of the theory of plate tectonics. </span>
Recently, Russia faces international conflict, especially about Venezuela Problems with EEUU.
Best regards