#3: A should be your answer
When exercising, your body needs more oxygen.
The economy is to define it according to primary, secondary and tertiary sectors.
Primary
Sectors<span><span /></span><span><span>Mining and Quarrying </span></span><span /><span><span /></span><span><span>
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Agriculture, Forestry and Fishing
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Secondary Sectors
Manufacturing
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Electricity, Gas and Water (utilities)
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Construction
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Tertiary Sectors
Finance, insurance, real estate and business services
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General Government
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Wholesale, retail, and motor trade; catering and accommodation
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Transport and communicationsHope it helps
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This is typically known as a social state, examples being Denmark, Sweden, and Canada.
The long term result would be that the region where it has occurred will split and the two parts will move away from each other, the growing gap between them will be filled with water which in time will become sea, there will be significant climate changes, the one part that'll be moving into more isolated position will make life forms on it to evolve in a specific way and they will become very unique in time.