Answer:
For the countour part: Map c, contour is 50m (the lines increases/decreases with 50 meters each step). Map b, need to see the whole map to decide.
Answer:
I believe the answer to this question would just be gravity
"Same question up top"
A. At the divergent plate boundary in the middle of the ocean
B. On the oceanic crust along the edge of the North American Continent
C. At the convergent plate boundary in the middles of the ocean
D. On the continental landforms on either side of the ocean
The answer is A. At the divergent plate boundary in the middle of the ocean (Apex)
Currents involve movement of ocean water masses, driven either by wind or by differences in temperature, salinity and density. The most important from a human perspective are the wind-driven surface currents that move water in the uppermost layer of the ocean.
Currents affect humans in several primary ways. Currents help shape the climate in the areas where we live, create the right conditions to support abundant ocean life in the areas where we fish, and change weather patterns through periodic events like El Nino/La Nina.
Ocean currents also cause upwelling in many areas like off in the inland parts of North America, where surface currents taking water away from the shore cause nutrient-rich water to well up from the ocean deeps. The abundance of nutrients in these areas forms fertile ground for kelp beds and marine fisheries, which in turn furnish food for humans. Alterations in current patterns like the El Nino/La Nina cycle affect humans as well by causing changes in local weather patterns in the years when they occur.
Types of farming include subsistence farming, mixed farming, nomadic herding, commercial plantation, livestock rearing, etc.