How does the electron arrangement change moving vertically down a group?

Electrons arrangement change is almost constant down the group, hence nuclear charge is almost constant.

But the energy levels on which electrons are arranged increase down the group, hence shielding or screening effect increases.

by cartels in other countries, shipped by air, mail, or land. i cant really see your answer choices : /

5.6⋅10−^19  j

do you need the explaination?