One is a
Two is b
I THINK...PLEASE DO NOT REPORT ME
<em />This is called a dependent (another word: subordinate) clause.
For example, in a sentence
<em>When I ask questions on Brainly, people answer them.</em>
"When I ask questions on Brainly, " is a group of words with a subject and a verb, but does not express a full thought.
Answer:
4. Exercise done regularly
Explanation: