Translation of "Actio" into English

At undenam oritur moralis appellatio actionis hominis libere agentis?

But on what does the moral assessment of man's free acts depend?

Actioni contrariam semper et aequalem esse reactionem.

For every action there is always an equal and opposite reaction.

Inter confectos proximis triginta superioribus annis progressus, conspicuus tribuendus est locus fraternae mutuaeque huic actioni.

Among the achievements of the last thirty years, this reciprocal fraternal influence has had an important place.

Haec enim exsecutionem totius eius actionis regiminis iuvat eamque efficacem reddit.

It is this which facilitates the acceptance of his every act of governance and makes it effective.