The word “however” shows contrast. It means “on the other hand” and “unlike this.” In the text, the word however contradicts and separates How petroleum was mainly formed, unlike coal. The shows contrast, and difference.
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Answer:
It seemed to have been constructed for no special use within itself…
Explanation:
There are two types of voices when it comes to the English grammar and these are the <em>"passive voice</em>" and the<em> "active voice."</em>
"Passive voice" means that<u> the recipient of the verb's action is the</u><u> "subject."</u> This is opposite to that of the active voice wherein <u>the subject is the one which acts upon its verb.</u>
The subject above is "It" and it is the recipient of the verb "have been constructed."
So, this explains the answer.
Answer:
FORMAL
to organize and do something, especially research
व्यवस्थित रूप से कुछ करना, विशेषतः अनुसंधान-कार्य
to conduct tests/a survey/an inquiryto conduct tests/a survey/an inquiry
2.
to stand in front of an orchestra and direct the musicians
मंच पर वाद्यवृंद का संचालन करना
the answer is a.
eeling or showing tiredness, especially as a result of excessive exertion or lack of sleep.