QUESTION: Fix punctuation: Wonderful length that gives extra warmth
ANS: Wonderful length that gives extra warmth.

QUESTION: Fix punctuation: Enforcement action through  Sweeps operations  which are coordinated by the European Commission and carried out simultaneously by national consumer enforcement authorities to see where consumer rights are being compromised or denied
ANS: Enforcement action through " Sweeps" operations , which are co-ordinated by the European Commission and carried out simultaneously by national consumer enforcement authorities to see where consumer rights are being compromised or denied;

QUESTION: Fix punctuation: Most of the melting takes place under the water
ANS: Most of the melting takes place under the water.

QUESTION: Fix punctuation: There are some things that will interest them for a day maybe 2 but a make a whole trip out of it is not a good idea
ANS:
There are some things that will interest them for a day, maybe 2, but a make a whole trip out of it is not a good idea.