Why is the action of phagocytes considered a nonspecific response?
it does not occur at any specific temperature.
it is not involved with the production of any specific type of lymphocyte.
it does not respond to any specific type of hormone.
it is a response to any type of harmful substance.

The best answer is that it does not involve the production of any specific type of lymphocyte.

When a pathogen breaches the skin and  enters the body, it meets the first line of (systemic ) defense inside the body, namely white blood cells called neutrophils. Neutrophils are always in circulation in the blood and when they meet any foreign body, they attack it by engulfing it (phagocytosis)  and kill it.

Neutrophils do not have memory of any pathogen. They attack any pathogen indiscriminately, not selectively. This is why they belong to the innate (non-specific) arm of the immune system.

Memory T- cells are lymphocytes that are specifically produced and act against pathogens that were encountered at least at one time before.  The memory of that encounter is kept and when the same kind of pathogen is encountered a  second time, it is remembered  by these cells and they very specifically single it out and destroy it. These cells belong to the specific or adaptive arm of the immune system.

The answer is actually D. it is a response to any type of harmful substance. If it is nonspecific response then it is for any type of harmful substance because "any" is not "specific"

ask your friends for what they got then copy it down if you don't have any friends which is fine than google it or pay the teacher

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.