I need help please
1.
The nucleus contains protons and .
neutrons
electrons
2.
Electrons in an atom make up most of the of the atom, while the protons and neutrons make up nearly all of the of the atom.
volume; mass
mass; volume
3.
The more an electron has, the further away it can be from the nucleus.
mass
energy

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.

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)