Which of the following sentences demonstrates correct grammar?

Adverb because it explains more about how the verb was done.

One should check for punctuation errors to ensure no grammar errors in their writing.

Adverb, it explains more about the verb

The correct usage is "fewer" when referring to countable items like people. Therefore, the grammatically correct sentence is:

b. If any fewer people watch that television series, the effect will be its cancellation.

Datum - singular form of data

Parenthesis - singular form of parentheses

Thesis - singular form of theses

Syllabi - plural form of syllabus

It clearly explains the paragraph as there are physical and psychological reasons for a daily walk.

It follows all the rules of punctuation compared to the rest.

Choice A: “I loved that show,” He said. “It’s my favorite of the year.”

In this choice, there is incorrect capitalization of "He" after the comma. Pronouns following dialogue should start with a lowercase letter unless they are proper nouns.

Choice C: “I loved that show.” he said. “It’s my favorite of the year.”

In this choice, there is incorrect punctuation after "show." There should be a comma after "show" to indicate that the dialogue tag "he said" is connected to the dialogue.

Choice D: “I loved that show,” he said: “it’s my favorite of the year.”

In this choice, a colon is used after "he said," which is not the correct punctuation for dialogue. A comma is typically used in this context to separate the dialogue from the dialogue tag.

So, Choice B is the only one that correctly follows the rules of punctuation and capitalization for dialogue.