Answer:
In Morse code, letters of the alphabet and other characters like numbers can be represented as sequences of binary numbers, although each bit in the sequence is sometimes called a “dit” or a “dah”. In writing, a “dit” is represented by a dot (.), and a “dah” is represented by a dash (-)
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The answers are construction and mining. Mining and construction both involve things where there's a lot of dust and this can cause respiratory issues because prolonged exposure clogs and ruins your lungs and can cause cancer. Mining and usage of fossil fuels like coal also destroys the air with carbon monoxide which also ruins the atmosphere and harms respiratory organs.
I believe that the answer is C. The terrain in a particular area.
