Well i believe the answer would be d but i could be wrong
a. use the same grammatical construction in all similar headings throughout an outline
Using the same grammatical construction in all similar headings throughout an outline is called parallel construction. Parallel construction is also known as parallelism. This means that two or more ideas has the same degree of importance in the sentence therefore it should be written or stated grammatically equal. This can also help in establishing the clarity of the idea you want to convey in the sentence. Some examples of parallelism are the following :
of loving so much
of hating too hard
of crying so long
Answer:
To inform the reader about some basic facts regarding the planet Mars
The answer would be A because cordial is being polite.
A prefix is added to the beginning of an existing word to creating a new word.
A suffix is added to the end of an existing word in order to create a new word.
The prefix of prenatal would 'pre-' meaning before.
The suffix of prenatal would be '-natal' meaning the time and place of birth.
Hope this helps!