Answer:
Option (A)
Explanation:
In the above-given question,
Option (B) is wrong with it's usage of the modifier "how'' in the sentence. If the modifier is used in one place (how heat from the inner core flows), it should also be used in the continuing clause (how the formation and periodic reversal).
Options (C) and (D) are wrong in using the word "are" for the whole sentence as there is no need to use this word. The verb form will depend on the subject, in this case, is "the discovery that earth's inner core" which is singular in nature. Thus, the verb form will be -is and not -are.
Option (E) is wrong for it's use of the comma. If the comma is used, then the whole sentence is not a full-fledged sentence but rather a dependent clause with no resolution.
The correct answer for the given passage is option (A).
Lesser Himalayas is a major east-west mountain range with elevations 3,700 to 4,500 m (12,000 to 14,500 feet) along the crest, paralleling the much higher Great Himalaya range from the Indus River in Pakistan.
It has good soil and a mild climate.
Less children are being born due to increased efforts to lower the CBR (crude birth rate) and improve contraceptive methods. This results in less children being born, meaning that the older people are increasing in dependency (because there's more older people in the older generations vs the newer)
Acid Rain is the natural cause which causes volcanic eruptions and emissions from vegetation.
<u>Explanation:
</u>
The volcanic eruption is a natural phenomenon that is caused due to the liberation of the lava from the heap of the earth along with the gases. The volcanic eruption results in causing major damages to the vegetation lying above the erupted crater of the volcano.
This results in the immense release of gases such as “carbon dioxide, carbon monoxide, sulphur dioxide, hydrogen chloride, hydrogen fluoride, methane and ammonia” and these gases are major pollutants of the air. When these gases react with water vapour that are present in the atmosphere, they condense in the form of acid rain.
