In Europe, many natural resources have been conserved because they have been overused. The correct option among all the options that are given in the question is the last option or option "D". I hope that this is the answer you were looking for and it has come to your help.
Answer:
Explanation:
Canal irrigation is when water is being passed through canals from rivers, streams, reservoirs etc to the farm.
The advantages of canal irrigation are:
1. The loss of water is reduced.
2. Water logging can easily be controlled.
3. The benefit can be enjoyed for a long time as it is a permanent structure.
4. A smooth surface is done which lead to an increase in the flow velocity.
The disadvantages include:
1. The cost involved in setting up the canal system is high.
2. A lot of time is required before its completion.
3. A lot of difficulties are experienced when it malfunctions or damages.
Answer:
Here is the difference
Explanation:
Climatic Climax Community-
In scientific ecology climax community, or climatic climax community, is a historic term for a boreal forest community of plants, animals, and fungi which, through the process of ecological succession in the development of vegetation in an area over time, have reached a steady state.
Plagioclimax vegetation cover
A Plagioclimax community is an area or habitat in which the influences of the humans have prevented the ecosystem from developing further. The ecosystem may have been stopped from reaching its full climatic climax or deflected towards a different climax by activities such as: Cutting down the existing vegetation.
Answer:
The migration during the 20th century has been mostly from less-developed (poor) countries to more-developed countries.
Explanation:
A is correct because during the 20th century, with the migration policies being made much more friendly and open, the people from the less-developed countries where the living conditions were terrible, to the more-developed countries where they could have much better lives.
B is not correct because it is actually the opposite, where people from different religious beliefs than those of the people of the county of their choice, have migrated and made much more diverse societies.
C is not correct because such migration has not been recorded so far.
D is not correct because the people from more-developed countries usually only visit the less-developed countries as tourists, but very very rarely migrate to them as they are aware of the risks and bad living conditions.
Answer:
Option (1)
False
Explanation:
The mid-oceanic ridge is one of the main features in the divergent plate boundary. Seafloor spreading takes place along this ridge, where the lithosphere becomes thin because of the uprising magma. The magma erupts at the surface forming a ridge which is commonly known as the mid-oceanic ridge.
As the magma melts at this ridge due to the decompression process, it solidifies and forms young basaltic igneous rocks. These are geologically the youngest rocks. With the increasing distance right from the mid-oceanic ridge, the age of the rocks increases.
Thus, the correct answer is option (1).
At this mid-oceanic ridge, when the magma erupts at the seafloor, it is comprised of magnetic minerals, which shows a specific pattern in the orientation of the earth's magnetic polarity. This forms alternate stripes, that starts from the mid-oceanic ridge and eventually expand outward. This pattern of earth's magnetic polarity is found in all the mid-oceanic ridges on earth.
Hence the given statement is false.
