Answer:
Following are the responses to the given point:
Explanation:

Area of cone:

Volume of cone:

Calculating the empty space:


Answer:
D. use the same grammatical pattern.
Explanation:
Parallelism literally means using the same structure in (say) writing. Another way to put it, is that; when presenting a point, the sub-points must follow the same grammatical pattern or structure.
For example, the writer can choose to present the points using past tense. If by chance, there is a mix of tenses; then, the sub-points are not in parallel
This also include using phrases or sentences of identical and similar structure in each point and/or sub-points.
<em>Option (a) to (c) refer to the layout of the sub-points. The only options that answers the question is (d).</em>
The Battle of Hastings was fought on 14 October 1066 between the Norman-French army of William, the Duke of Normandy, and an English army under the Anglo-Saxon King Harold Godwinson, beginning the Norman conquest of England.<span>The </span>battle of Hastings<span> took place on October 14th 1066. It was between Harold Godwin and William the Duke of Normandy. ... Some of Harold's best soldiers the housecarls had been injured or even killed in the </span>battle<span> so Harold had a weak army, which was mainly made up of farmers.</span>