Usually the y-axis stands for dependent variable while the x-axis stands for independent variable. And the curve stands for the relationship between the two variables. The control variable and measurement variable often means the independent variables.
I think the correct answer among the choices is option B. When antibodies are produced by lymphocytes, the body is conducting adaptive immunity. It is also referred to as acquired immune system. Adaptive responses are carried out be the white blood cells.
A) plant because it does photosynthesis
These are the characteristics of a plant. Fungi do not photosynthesize.
