Y anyone who got p-adlet and is 14-16 come here https://p-adlet. com/newdawn_1/t2l2y32g2l4bt2ty
dont forget to take out the dash in the link where the word p-adlet is
if you aint got p-adlet dont even bother wastin ur time answerin this

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

the endomembrane system i think

d. organisms have cells with different shapes and functions.