Answer :
Final answer:
The part of a river or stream where the water is muddy and rich in nutrients is the Floodplain Zone.
The answer is option-->a
Explanation:
The Floodplain Zone is an area adjacent to a river or stream that experiences periodic flooding. During floods, the river or stream overflows its banks, depositing sediment and nutrients onto the surrounding land. As a result, the water in the Floodplain Zone becomes muddy due to the suspended sediment and is rich in nutrients.
This muddy water and nutrient-rich environment provide favorable conditions for the growth of vegetation and the development of diverse ecosystems. The sediment and nutrients carried by the floodwaters contribute to the fertility of the soil, making it highly suitable for agriculture.
The Floodplain Zone is also an important habitat for various organisms, including fish, amphibians, birds, and insects. The availability of abundant food and shelter in this zone supports a wide range of plant and animal species.
In summary, the Floodplain Zone is the part of a river or stream where the water is muddy and rich in nutrients due to periodic flooding, making it a vital and productive ecosystem.
The answer is option-->a
