1. Covection Heat Transfer is A. when two objects touch and heat is transfered to the colder object

B. when hot fluids rise and cool, then sink due to the density, to only get hot, and rise again.

C. when heat travels in electromagnetic waves to heat an object it is not touching.

Choose the correct answer.

i have to report this, it doesn't relate to biology

the answer is otpion c) understanding

he wants to be heard one more time. he wants to be understood. he needs the truth one more time.

answer and explanation;

volcanic rocks are igneous rocks which form from lava, molten rock which has been thrust out of a volcano onto the surface of a rocky body such as an asteroid, planet, or dwarf planet.  

plutonic rocks are igneous rocks which form from subterranean chambers of molten rock or magma. plutonic rocks make up the base of continental crust as well as oceanic crust. their slow rate of formation causes them to be coarse grained since there is plenty of time for large crystals to form before the magma solidifies into rock.

the textural difference is that plutonic rocks are more coarse grained than volcanic rocks. plutonic rocks are coarse grained while volcanic are fine grained ; glassey or fragmental. since fine and coarse are adjectives the decision as to whether a rock is fine or coarse grained is generally made on the bases of whether or not the individual crystals can be seen in most if the rock.