Answer:
Coastal landforms are often subtle or are difficult to distinguish from other features, such as stratigraphic terraces and fault scarps, and often extend over vast areas, requiring both high-resolution imaging and regional coverage.
Economic opportunities seems to be the driving factor for migration nowadays. An example of a group of migrants migrating from areas with a lack of economic opportunities to areas with more economic opportunities are Mexican immigrants seeking job opportunities.
Push factors, war, little food or water. pull factors, more job opportunities, or better way of life. basically a push factor is something bad that happens to make you want to leave, and a pull factor is something good that makes you want to go to a better country for better things, hope this helped.