The answer is the outer core.

The outer core of the Earth is made up of liquid metal. The liquid in the outer core pass through the magnetic field and this causes the flow of electric current with in it. The magnetic field gets stronger as the liquid metal passes through it. What makes the liquid metal move is the inner core. It heats up the outer core which triggers convection.

6 0

2 years ago

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Without the presence of sea otters, sea urchins would otherwise overgraze kelp beds, dramatically changing the marine community

densk [106]

I think it is keystone. If they were not there the population of urchins would go up and the kelp would go down.

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2 years ago

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Rich has just been infected with the hiv virus. the infection cannot be confirmed biochemically for at least __________ .

mario62 [17]

For at least 60 days.