The answer would be 36, you just fill in what you know and solve the problem.
You didn't put any answers, but probably environmental groups.
I am pretty sure that the tissues which receive stimuli and conduct impulses or electrical signals in the body are being shown in the option : Nerve tissues. I choose this one because, according to the definition of nerve tissue, this is <span>the main tissue component which perform all the listed processes.
Hope that helps!</span>
Answer:
C. Electron (e-) has a negative charge