What should an operator keep in mind when preparing a boat for safe towing?

The thing that an operator should keep in mind when preparing a boat for safe towing is: An appropriate hitch and safety chains should be used
If the appropriate hitch and safety chains are missing from the equation, the towed vehicles could be cut loose during the towing process and caused accidents.

Ithink it’s bill gates.

Ifound the exercise on the internet. attached is the list mentioned above.in order for a compound to be considered optically active it can't have any axis or plan of symmetry. the molecule  shouldn't also  be superimposable on its mirror image.with such considerations, the compounds that are optically active are: -third compound on the first image is optically active; -second and third compound from the second image are optically actives.