In a population of giraffes, in a 12-month period, 70 giraffes were born and 45 giraffes died. How did the population change during the 12-month period? (Assume all other
factors did not change.)
A. The population increased by 70 giraffes.
B. The population increased by 25 giraffes.
C. The population decreased by 45 giraffes. clade 3AV Koso:03cit
D. The population decreased by 135 giraffes.

they deliver oxygen to the blood

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.

not: both offer magnification to the atomic level.