Answer:
I believe it's B and C?
Explanation:
It's def not A, and I don't believe D is true. I'm not sure if both B and C are correct, but since it's all that apply I'm going to say they are. Sorry, I'm never very good with astrology, you may want someone to double check me!
Earthquake mainly occur when there is rock movement along a crack on the crust of the earth. The slippage of the rocks causes shock waves that travel on the earth. A focus is a point on the earth where the actual movement takes place and an epicenter is a point which is directly above the focus. Seismographs are devices that record the earthquakes and do so by showing major waves patterns that is p-waves, s-waves and L-waves. Wave travel time from the epicenter to the seismic station can be estimated fro the travel charts.
In this case if the epicenter is 3200 km from the seismic station then the s-wave will take 11 mins 10 sec.
The changes in land use associated with urban development affect flooding in many ways. Removing vegetation and soil, grading the land surface, and constructing drainage networks increase runoff to streams from rainfall and snowmelt. As a result, the peak discharge, volume, and frequency of floods increase in nearby streams. Changes to stream channels during urban development can limit their capacity to convey floodwaters. Roads and buildings constructed in flood-prone areas are exposed to increased flood hazards, including inundation and erosion, as new development continues. Information about streamflow and how it is affected by land use can help communities reduce their current and future vulnerability to floods.<span>
Hope this helped.</span>