Questions & Answers about Он выполняет приказ.
Выполнять means to carry out, fulfill, perform, execute. It is a very natural verb with things like:
- приказ = order, command
- задание = assignment/task
- обязанность = duty
- план = plan
So Он выполняет приказ means he is carrying out or obeying an order.
Using делает here would sound wrong, because Russian does not say делать приказ for carry out an order.
It is present tense, 3rd person singular of выполнять.
That means:
- я выполняю = I carry out
- ты выполняешь = you carry out
- он/она выполняет = he/she carries out
So выполняет matches он.