In the earth's mantle, heat is transferred in large convection currents. within these currents,
a. cooler and hotter rock rise but do not sink.
b. hotter and cooler rock sink but do not rise.
c. hotter rock rises and cooler rock sinks.
d. cooler rock rises and hotter rock sinks.
C. The hotter rock rises and the cooler rock sinks
Heat rises and as the warmer rock gets further away from the superheated center of the Earth it begins to cool off and starts to sink back toward the superheated center of the Earth where it is reheated and the whole process starts over again. That is what a convection current is.
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venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.
here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.
so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.