A subordinate clause is a dependent clause that cannot stand on its own.
The subordinate clause here is <em>I am reading.
</em>The whole sentence is <em>The book (that) I am reading concerns world population problems.
</em><em />As you can see, the independent sentence is The book concerns world population problems, because it can stand on its own.
That I am reading cannot.
Answer:
[2] They can be entertaining to watch but extremely dangerous when used by untrained individuals.
Explanation:
It's option 4, prompt as the phrase 'i always made sure to show up on time' means on time
