Unless he has been left alone - This is a subordinate clause as it needs an independent one to fulfill its meaning and make it correct.
Rover rarely barks or whines - This is an independent clause because it can stand on its own and convey meaning without help from other clauses.
<em>A restrictive clause is a clause which functions as an adjective to identify the word it modifies. A restrictive clause is essential for the intended meaning. A restrictive clause is not offset with commas.</em>
D. Could I use your computer if I’m careful?
Answer:
The Pigeon Point Light was named for the clipper ship Carrier Pigeon, which sank off the nearby point of land in 1853. After three more ships were lost in the same area, Congress approved construction of a lighthouse at Pigeon Point, at the cost of $90,000 (which would be well over $2 million today).
