The important occupations in coastal plains are both agriculture and fishing. Coastal plains are flat or gently sloping areas that are located along the coastlines of continents. These regions are characterized by their proximity to the ocean and their fertile soil, which makes them ideal for certain types of occupations.

Agriculture in Coastal Plains:
- Agriculture is an important occupation in coastal plains due to the fertile soil and favorable climate. The flat or gently sloping terrain allows for easy cultivation of crops.
- Farmers in coastal plains grow a variety of crops such as rice, corn, soybeans, fruits, and vegetables. These crops thrive in the coastal plain's warm climate and abundant rainfall.
- The fertile soil in coastal plains is rich in nutrients, making it highly suitable for agriculture. This allows farmers to produce high yields of crops, making it an important occupation in the region.
- Agriculture in coastal plains not only provides food for the local population but also contributes to the economy through the export of agricultural products.

Fishing in Coastal Plains:
- Fishing is another important occupation in coastal plains due to their proximity to the ocean. Coastal plains provide easy access to fishing grounds and support a diverse range of marine life.
- Fishermen in coastal plains engage in both commercial and subsistence fishing. Commercial fishing involves catching fish and other marine resources for sale, while subsistence fishing is done for personal consumption.
- Coastal plains offer a variety of fishing opportunities, including offshore fishing, estuarine fishing, and shellfish harvesting. These activities provide a source of livelihood for many coastal communities.
- Fishing in coastal plains not only provides food but also supports the local economy through the sale of fish and seafood products. It is an important source of income for many coastal communities.

Both Agriculture and Fishing:
- Coastal plains offer a unique combination of fertile soil and access to the ocean, making them suitable for both agriculture and fishing.
- The availability of agricultural land allows for the cultivation of crops, while the proximity to the ocean provides opportunities for fishing.
- Both agriculture and fishing contribute to the local economy and provide employment opportunities for the residents of coastal plains.
- The combination of these two occupations ensures a diversified economy and a sustainable use of the coastal resources.

In conclusion, the important occupations in coastal plains are both agriculture and fishing. These occupations take advantage of the coastal plain's fertile soil and proximity to the ocean, providing food, employment, and economic opportunities for the local communities.