<span>The elements that are found in a high proportion in Earth's crust are oxygen, aluminium, iron, calcium, potassium, sodium, and magnesium. But for your Option, I think it is B) Oxygen and Silicon. This is because Oxygen makes 46.6% while Silicon makes 27.7% of the Earth crust.</span>
First question=true
second=false
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Answer:
The economic principle that helps ensure that scarce resources are allocated efficiently is "the profit motive."
Explanation:
In economics, the profit motive is the inspiration of organizations that function so as to exploit their profits. Conventional micro-economic concept suggests that the eventual goal of a commercial is to make money. Specified differently, the aim for a business's presence is to chance a profit. The profit motive is the craving to make money. In a free market (where people willingly swap money, goods and services, the profit motive agrees who grows what. In theory, the profit motive dispenses resources efficiently, but in practice there are some problems.
Answer:
in the Air sacs
Explanation:
the air sacs has a million tiny holes and that is probably where oxygen transfers
<span>However, these advancements that other people are talking about will not probably last for very long since much resources were used to exploit and overuse the natural resources we currently have. The question of what about the future populace who are significantly viable to live under this planet, 100 years from now? Isn't that claim sort of egotistical?
Exploitations lead to different global ecological changes like the occupation of the invasive species which can threaten an ecosystem and the biodiversity of the organism that exist in the present environment when the invasive species increase rapidly in number.
</span><span>Exotic species are a threat to biodiversity because they alter the ecosystem of that area. They share food and habitat resulting in unbalanced ecosystem. </span>
