The correct answer of the given question above is option A. The line of defense that his immune system is exhibiting in this situation is the first line of defense. The first line of defense includes the physical or external line of defense of the body that are responsible for inhibiting of the entry of foreign microorganisms. Such include the skin, tears, cilia, mucus, urine flow and even stomach acid.
Answer:Plants absorb sunlight and turn that energy into food once put together the process is known as photosynthesis.
Explanation:
Most scientific questions are based off of theory.
Properly identifying each species.
Accurately recording his findings.
Not interfering with ecosystem while studying the birds.
