Please capitalize where necessary: mark lost his wife and his seven children in a tragic house fire near pelham, ontario.
A: Mark lost his wife and his seven children in a tragic house fire near Pelham, Ontario.

Please capitalize where necessary: the fastest and easiest way to open your background file is to double-click it.
A: The fastest and easiest way to open your BACKGROUND file is to double-click it.

Please capitalize where necessary: black spots, pimples and red spots all this will disappear a few days after the start of taking this dietary supplement.
A: Black spots, pimples and red spots all this will disappear a few days after the start of taking this dietary supplement.

Please capitalize where necessary: to take an extreme example, there is no pigmentation in the skin of an albino because of a defect in melanin metabolism.
A:
To take an extreme example, there is no pigmentation in the skin of an albino because of a defect in melanin metabolism.