Answer: Estuary inhabits salt marshes and mangrove forest which helps in filtering toxins from the environment
Explanation: Estuary is a semi-enclosed body of water connected to both sea and river. They are coastal body in which salt water from ocean mixes with fresh water from river.
Estuary helps in filtering toxins like carbon dioxide, heavy metals and herbicides out of the environment. These are pollutants as a result of anthropogenic activities (human activities).
Estuary inhabits salt marshes and mangrove forests which helps in the filtration.
Mangrove forests are good carbon scrubbers (they help in removing excessive carbon dioxide from the atmosphere) while salt marshes have peat and mud which absorb the heavy metals, herbicides and pesticides from the water flowing through them.