Programs seeking to improve the health of north america's farmlands will likely focus on these areas. select all that apply. -biodiversity -erosion -seismic activity -water pollution -weathering

Programs seeking to improve the health of North America's farmlands will likely focus on these area: biodiversity, erosion, and water supply.  

The agriculture industry in North America is diverse with various industries. However, agriculture poses an environmental threat to the continent. Some of the challenges include soil degradation and groundwater pollution resulting from the use of chemicals in farms.

Another concern is water supply which has become a global concern and since agriculture consumes about 70% of freshwater it is really, the industry may be in water distress. In the past, there has also been over-harvesting of timber which threatened the biodiversity and affected timber production in the area.

answer; native americans who sometimes actively impeded railroad construction; physical obstacles like rivers and canyons, and

separation of church and state? not sure what you mean.