Answer:
The sentence it will introduce will be contrasting to the sentence(s) before that.
Explanation:
E.g. I woke up late. <em>However</em>, I got to school on time.
["However" here contrasted the idea that "I" might be late for school since "I" woke up late]
D.<span>Birds have developed effective skills to survive.</span>
Answer;
Sara suddenly became very ill; therefore,she went to see her doctor.
Explanation;
A semicolon is most commonly used to link (in a single sentence) two independent clauses that are closely related in thought.
When used to join two or more ideas (parts) in a sentence, those ideas are then given equal position or rank.
You cannot use a semicolon to list off objects, such as letter a and b.
You also can't use one in the middle of a sentence, like the third sentence.
Big grizzly bears, meat eaters, hunting wolfs