which is one of the ecosystems found in intertidal zones?\nestuaries\ntrenches\ncoral reefs\nkelp forests

Brief Explanations:

Intertidal zones are areas between high - and low - tide marks. Estuaries are partially enclosed bodies of water where freshwater meets saltwater and can be found in intertidal zones. Trenches are deep - sea features far from intertidal zones. Coral reefs are usually in subtidal or shallow marine areas, not typically in intertidal zones. Kelp forests are also in subtidal areas.

Answer:

estuaries