Answer:
Jobs focused on providing services are part of the tertiary economic sector.
Explanation:
There are four economic sectors based on the activities that are performed by the people. The primary economic sector, secondary economic sector, tertiary economic sector, and quaternary economic sector are the four economic sectors, all of which have their own unique characterisitcs. The tertiary economic sector is characterized by providing services.
ng serIn this economic sector, the jobs focus on providing services for the customers, and this is a sector that tends to be dominant in the countries that are well developed or the countries that have no other choices than to get engaged in it in order to have income. The well-developed countries are dominated by this sector because in the primary and secondary ones they don't need much labor force because of the advancements in technology, plus this sector is highly profitable. The countries that depend almost exclusively on tourism for income, like the big portion of the island nations at and around the tropics, have almost all of their labor force engaged in tourismm thus providing services for the tourist.
When the prediction about the population of a country is going to increase in next two decades is made , what might be the result of the population increase is option B which are Basic needs, such as food and water, will be scarce.
<h3>What is overpopulation?</h3>
Over population serves as the increase in the number of the population of a region which bring about the scarce of resources among them.
Therefore, what might be the result of the population increase is option B which are Basic needs, such as food and water, will be scarce.
Learn more on population at:
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I think Tibet is the most tropical
The answer is b. a common currency
hope this helps ! :D
Answer:
b. flat rotation curves in spiral galaxies
Explanation:
Dark matter accounts for majority of the matter in the universe (about 85%). It is considered to be composed of subatomic particles which are yet to be discovered. Dark matter cannot be observed because it does not emit light that can be detected. Only its gravitational effect is visible.
Astronomers when calculated the mass of the visible matter and tried to account for the observed speed of stars in the galaxy, there was a mismatch. To understand what caused this mismatch, astronomers gave name to the invisible matter as the Dark Matter.
The expected velocity of stars should decrease away from the near the center of the galaxy but a constant velocity of stars was observed that is a relatively flat rotation curve was obtained.
Thus, flat rotation curves in spiral galaxies in an evidence of Dark Matter.
