Answer:
B. Sustainable yield
Explanation:
The renewable resources are resources that are able to renew on their own. Still, that doesn't mean that these resources can provide endless amounts, but it has to be taken in consideration what is the sustainable yield. We can take the trees as a perfect example. The wood is a renewable resource, but in order for it to be renewable, the trees that have been taken down have to be replaced with young saplings, so that they replace in time the ones that have been removed. If that is not practiced, and much more trees are taken down than what are planted, then the trees will eventually come to an end, and after some time there will be no trees left to be used as a resource.
Answer:
D. Short-period comets come from some location near the ecliptic plane of the Solar System, and long-period comets come from farther away, with random directions in a spherical distribution around the Sun.
Explanation:
- A comet is an icy rocky and small system body that passe near the sun get warmed and begins to release gases and is due to the effects of the solar radiation and have a highly eccentric elliptical orbit.
- The long-period comets are those that have more than 200 yeas to complete and originate from the Oort Cloud.
- And the short periods of comets are those that have less than 200 days of orbital periods as they have a low inclination.
- The periods are less than 20 years and they are subject to a gravitational disturbance around larger bodies.
They allow people to move easily between the countries. Also more share a common currency.
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