Select the most appropriate meaning of the given Idiom:-

At one’s beck and call 

At one’s service

The most appropriate meaning of the idiom "at one's beck and call" is at one's service. The idiom comes from the idea that someone who is at someone else's beck and call is always ready to do whatever they ask, as soon as they ask it. This idiom is often used to describe someone who is very subservient or obedient to another person.

The other options are not as accurate descriptions of the meaning of the idiom. Imitating others is not the same as being at someone's service. Ponder over something means to think deeply about something, which is not the same as being at someone's service. Free from difficulties and dangers is not typically associated with the idiom "at one's beck and call."