The correct answer is - A. A few centimeters a year.
Earth's crustal plates move very slowly, between 2 cm and 5 cm (depending on the plate) annually. This is the reason why it takes millions of years for them to significantly change their position, and with it the appearance of our planet. These crustal plates are slowly moving around the planet because they are powered by flow in the interior mantle.
Answer:
The tail and the caudal fin are the chief locomotory organs of fish and are used for rapid swimming during which tail is lashed from side to side by "alternate contraction and relaxation" of the myomeres on the two sides of the vertebral column.
Explanation:
When sound waves hit a solid surface they either reflect, refract, or absorb.
Echo's are caused by the reflection of sound waves.
A.) Burning waste is bad because it will pollute the atmosphere. So this is not the answer.
B.) More coal based electricity will mean more smoke and ground pollution. Not the answer
--> C.) Starting recycling programs will help reuse the material rather than tossing It in a landfill. This is the correct answer.
D.) Driving cars means pollution, again, it releases carbon monoxide into the air which is bad for the ozone layer of the earth.
