Image shows answer, obtained from google.
Answer:
your answer is b cells are white blood cells that work by producing antibodies, whereas t cells attack foreign invaders directly.
Explanation:
flashcards
I don't know witch definition you mean, but here: https://www.google.com/search?q=google+dictionary&rlz=1C1CHBF_enUS871US871&oq=google+dic&aqs=chrome.0.0j69i57j0l6.3972j0j7&sourceid=chrome&ie=UTF-8#dobs=blowout
A
Bitstuctscudycvivocutxdyctti