What is the primary effect of constructive waves on a beach?

Constructive waves primarily result in the deposition of materials, which plays a crucial role in the formation and growth of beach areas. Unlike destructive waves that are more powerful and focus on eroding the coastline, constructive waves have a gentler approach. They carry sand and sediment up onto the shore during their swash phase, allowing for the accumulation of these materials. As the waves retreat, they have less energy to draw sediment back, leading to a net gain in sand on the beach.

This process gradually builds up the beach, leading to wider and more stable environments that can support various ecosystems. Therefore, the primary effect of constructive waves is their ability to deposit materials, significantly contributing to the beach's growth and overall structure.