Answer:
When a wave is too steep to support itself, the wavefront collapses creating a <u> </u><u>break </u>that advances up the shoreline
Explanation:
When waves are tall, with a great slope that makes them unstable, they break. Braking waves might occur inshore or offshore.
- Offshore: Breaking waves in the deep sea occurs when the wind speed increases so fast that they exceed the speed of the waves. These last ones acquire additional energy from the winds increasing their slopes to the point of being so unstable that the water from the crest falls forward and breaks the wave. The most influencing factor in these breaking waves is the speed of the winds.
- Inshore: When waves are near the shore, the scarce water deepness increases the friction of the wave with the marine bottom, and consequently, the wave´s speed decreases progressively. The wave loses energy in the friction, the wave energy is concentrated in a lower length, and the wave grows in size. As it increases, it acquires a sharper slope. As deepness decreases, the wave base loses speed, but the crest does not. As the wave crest travels faster, the frontal face of the wave becomes concave. This change in shape continues until the wave can not support itself and it breaks. The break is not produced by the friction with the bottom, but by exceeding the slope limit values.
Let's look at the option:
A. Only wealthy nations need to repay their debts, so it slows their
progress.
-this is not true, as not only wealthy nations need to pay back debt, but all nations
B. This is no longer a problem because debt repayment was
completely erased after World War II.
-this is not true: this is still a problem, and quite a big one.
C. Both measures rob a developing
nation of money it could use to invest in social welfare improvements.
Well, debt repayment does rob developing nation of money that it could use for other purposes: so it's true! (structural adjustment doesn't rob but it maintains the state in which the nation needs to pay back the debt)- this is the correct answer!
D. They always penalize highly developed nations rather than
underdeveloped ones.
- This is not true, as both countries are penalized, and the underdeveloped ones even more so.
I believe the answer is that under natural conditions oceans are self-cleaning systems.
This is true, that Colombia is north of Brazil and in actual fact it is NW of Brazil. Colombia and Venezuela are both north of Brazil. Brazil is the largest country in Latin America and forms part of the BRIC countries ie Brazil Russia India China that have a large economic impact on the world.
