Help me please please

I think its 1 2 and 4 im not sure but i think ive had that question before

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

it's c (engineer's do their work with mechanical stuff not on any living being)