Through what basic programming language can beginners easily get the concept of programming?
Actually, this depends much more on the teaching methodology you use rather than the language. The best answer might just be the language that you, yourself, are most productive in. But if you aren't a programmer yourself, it may be very difficult for you to teach them. 

But, if I had to name a language that is (a) fairly modern and (b) fairly forgiving of beginners and (c) widely used and (d) a useful tool for people with other interests, then it would probably be Python. If you give up one or more of my criteria there are many other choices. 

But the teacher needs to be proficient in the language and its use. Programming is a way of thinking, not just knowledge of the features of a language. I worry that, just because you are asking this question, that you may not have the required background to do a good job of this. 

However, all is not lost. I asked a question of my own here a while ago that might provide some guidance to you if you are, indeed, a novice programmer yourself. See the question and at least my answer to How do you teach something when you don't know it yourself.  The short version is you admit your lack of knowledge and learn it along with the students. But first you need to find good tools and resources. 



If you use Python, make sure you use V3 and not the earlier and incompatible V2. It isn't any harder to start with the current version.