To carry out is to actually do a plan, order or experiment. Carry out the work, carry out a survey, carried out as instructed.
It is the standard verb of reports and instructions, where somebody must carry out the work rather than simply do it. The parts separate around a pronoun, so you carry out an order and carry it out.
1phrasecarry outTo actually do a plan, order, or experiment.
“The scientists will carry out the experiment again to check their results.”
carry out is a doing.
Also accepted in games: perform
Carry plus out, in Middle English, from the sense of taking something through to its end.
Middle English
caryen out
English, today
carry out
From Middle English caryen out, equivalent to carry + out.
Etymology from Wiktionary, CC BY-SA