Is this sentence correctly punctuated?
2. We will need to think carefully about what we take with us - (tents, sleeping bags and torches are essential)
No.
Study the other links I gave you, plus the one here:
http://grammar.ccc.commnet.edu/grammar/marks/period.htm
One more try, so be careful. Read and study what I've sent you. The answers are there.
Yes, the sentence is correctly punctuated. The use of parentheses in this case is acceptable to provide additional information. However, there is one minor issue. The hyphen should be replaced with an em dash (—) to indicate a stronger break in the sentence. Here is the corrected punctuation:
2. We will need to think carefully about what we take with us—(tents, sleeping bags, and torches are essential).