Q: What aspect of the social security act is an example of an implied power
Lets break this down into three keywords/phrases to form the basis of understanding.
An aspect is a quality, a feature or a way in which a thing may be viewed or regarding. In the terms of the question itself, the usage of aspect means a feature. So, for the answer, you're looking for a specific aspect (or feature) within the social security act which leads us straight into the second keyword (or phrase in this matter) which is social security act, to my knowledge is a legislation for the retirees, unemployed and a lump-sum benefit at death, so mainly pensions and for unemployment. We have already concluded that we are looking at an ASPECT of the SOCIAL SECURITY ACT and given the three examples I aforementioned, my bet would be on the unemployed in regards to implied power and smoothly onto the last bit of this question - Implied power is where a political power not expressly named in a constitution but that is inferred because it is necessary to the performance of an enumerated power.
Just a note: I am not from America, so I'm not familiar with your constitution so I can't help you in-depth with that.