Answer:
The skin is an organ of protection
Explanation:
The primary function of the skin is to act as a barrier. The skin provides protection from: mechanical impacts and pressure, variations in temperature, micro-organisms, radiation and chemicals.
It is not easily recognizable
Magnolias, laurel, barberry, early sycamores, and palms.
Hierarchy - I don’t think I have the full context of the question but the word fits the best of its biology related