The answer C, the carbon cycle
1838
Theodor Schwann (1810-1882)
In 1838, Schwann and Matthias Jakob Schleiden (1804-1881) developed the "cell theory." Schwann went on and published his monograph Microscopic Researches into Accordance in the Structure and Growth of Animals and Plants in 1839.
I think it might be the third on I’m not sure completely wait on a second person
• a liver is transplanted from a donor to a recipient - adaptive immune response (via T killer cells or B cells)
• a person is injected with the typhoid vaccine-adaptive immune response (The immune response to vaccination may not be perceived as illness but still confers immune memory)
• swelling occurs around the area of a scratch-innate immune response (inflammation)
• a person has a high fever during a viral infection-innate immune response(includes substances called interferon and interleukin-1 which causes fever).
Transfer RNA or tRNA transfers the RNA out of the nucleus to the ribosomes