Research how physical features of the coastal areas are beneficial to its inhabitants.

They can collect some marine objects like shells and also the fresh winds are due to the physical features.

Explanation:

Waves, tides and currents are the responsible to the erosion in coastal areas, this physical feature will give some benefits to the people there because the movement of the waves can bring to the beach some shells to sell or some crabs to eat.

Also coast are dynamics, that mean, that they move faster in their content, giving some reasons to visit the beaches as touristic places.

Waves and tides of coast also can be attractive for some boats (or practicing sailing) or other aquatic sports like surf.

Hope this information is useful.