Answer:
Nature
Explanation:
Because erosion happens in the nature.
The importance of the International System of Measurement is important because it provides the same values for measurements such as length, weight, and time no matter where in the world the measurement is performed.
It is the c believe me I am trustworthy
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a. Cassegrain focus</span> is the focal arrangement in a Cassegrain reflector used in optical telescopes and radio antennas. The primary mirror is a concave mirror, and the secondary mirror that reflects the focused light back to it is a convex mirror.
