The correct answer is B.
The first two sentences are establishing characteristic shared by both petroleum and coal. The word "however" is used to contrast the similarities already presented with the differences that will be stated in the following sentences.
The answer is Rhythm, hope this helps!
Embankment refers to a long artificial bank built to retain water, or to support a road.
The importance would be all the time and effort he put into it but know that he is dead he would have someone to take over
A. simile because simile uses like or as in a figurative sentence