The correct answers are 1, 3, 4, and 5. Yellowstone National Park, as its name implies, is managed by the federal government; air traffic controllers are federal employees as well. 1, 3, 4 and 5, on the other hand, are the responsability of state and city governments.
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Image result for What was one thing Frida kahlo did that was important?
Artist Frida Kahlo was considered one of Mexico's greatest artists who began painting mostly self-portraits after she was severely injured in a bus accident. ... She exhibited her paintings in Paris and Mexico before her death in 1954.
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Like I don't know soooo.
Answer: It indicates that wagon consisting the letter X is the last wagon of the train. It easily alerts the railway officials so that they can save from the accident.
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