Question

fix any punctuation or capitalization errors below. click \submit answer\ if there are none.
the stamps in reverend lovejoys collection are of great quality: they are also hard to find.

Explanation:

The sentence has two independent clauses ("The stamps in Reverend Lovejoy's collection are of great quality" and "they are also hard to find") that are related in meaning (adding information about the stamps). A semicolon (;) is appropriate to connect two independent clauses that are closely related, while a colon (:) is used for introducing a list, explanation, or quotation. So we should replace the colon with a semicolon.

Answer:

The stamps in Reverend Lovejoy's collection are of great quality; they are also hard to find.