Answer: Coastal process like waves,tides and wind affect the coastline and impact primary productivity.
Explanation:
This process affect primary productivity in following ways:
a-Positive effects:
1-waves and currents bring nutrients from the ocean floor,supporting phytoplankton growth.
2-Coastal processes create habits like beaches,dunes which support diverse plant and animal communities.
b-Negative effects:
1-causes erosion
2-sedimentation ,which can smoother habitat and reduces light and oxygen for plants and animals