What’s drugs produce a calming effect by slowing brain activity and reducing the heart rate

Anti-anxiety

Explanation:

Anti-anxiety drugs, also known as anxiolytics, are drugs that produce a calming effect by slowing brain activity and reducing the heart rate of a person. These drugs are used in order to inhibit anxiety and the symptoms that accompany it, such as tachycardia and palpitations. Although some recreational drugs may induce anxiolysis, in general they tend to be anxiogenic.

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

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