(1) You sounded like asking what is the easiest medical degree to earn. Traditionally, the phrase “easy to earn” tend to be associated with “
half-hearted” impression. Seriously, do you want a half-hearted doctor tend to your health care? If you are asking which engineering degree is the easiest to earn, then probably you aren't ready for an engineering degree. None of them are really easy to earn.
(2) Engineering degree is a problem-solving intensive, maths intensive, time intensive, and detail-oriented field, where they don't allow for mistakes or “half-baked” work. These people are
meticulous because they have to be. They don't accept second best on any job.
(3) It is not difficult solve one- or two-dimensional problems. But things are getting more complicated in multivariate problems. Similarly, managing engineering project successfully is both an art and a science and attempts
to control and optimize corporate resources within the constraints of time, cost, and performance.
(4) Take Tensor Calculus in Structural Mechanics (Civil Engineering) for example, even Albert Einstein (1879 – 1955) had learned about the language of tensors with great difficulty, which he used to formulate General Relativity. To summarize, the word “
Easy”
isn't in the engineer's vocabulary.

just simply ask, take it easy man, hmmm great answer for me. haha ...btw i believe it's not hard in anything if we possess a great passion towards the thing we do