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Answer</h2>
These lines measure the distance of Prime Meridan
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Explanation</h2>
Prime Meridian line divides the earth into two hemispheres as South hemisphere and North hemisphere. Lines of longitudes runs vertically on the globe as up to down to connect these north-south poles. These lines are used to measure the distance of East or West location from the prime meridian. These lines cross the equator at the right angle (
) also known as Greenwich Meridian.
Because you mentioned the equator, that's part of the answer. The amazon is hot because it is by the equator. The equator is one of the hottest places on the earth because the sun's rays are very close to it or on it. That's why it's hot<span />
I think that it is Legend that can help determine the meaning.
Hope it helps
Which country are you referring to?