Answer:
480 million years ago
The Appalachians first formed roughly 480 million years ago during the Ordovician Period, and once reached elevations similar to those of the Alps and the Rocky Mountains before they were eroded.
Explanation:
so b is your answer
If you work hard, but only work, and do not take your time to rest and to do other things that you enjoy (hobbies, play) then you might suffer a burn-out and be tired. this might affect your health, be a source of stress - so it will not bring contentment.
The statement is false!
Message flow is typically one-way, source to receiver. Harder to initiate, but Internet is changing that.
Cyanosis is not likely a clinical manifestation of a tuberculosis infection.
Typical manifestations of tuberculosis include low grade fever, night chills, cough. It is a bacterial infection which spreads through inhaling tiny droplets from sneeze of an infected person.
Tuberculosis generally affects the lungs but can affect other area of the bodies such as abdomen, bones and nervous system.
The other symptoms may include chest pain, coughing up blood, weight loss and weakness.
Learn more about tuberculosis here:
brainly.com/question/1809260
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