The difference between non-spontaneous and spontaneous reactions is that non-spontaneous reactions:

occur faster than spontaneous reactions

require outside interference to occur

release free energy

occur without an input of heat

The answer to your question is: second option

Explanation:

occur faster than spontaneous reactions   The speed of a reaction does not depend if it s spontaneous or not. This option is incorrect.

require outside interference to occur  This option is true, non spontaneous reactions requiere heat, a catalizer or any interference to occur.

release free energy   This option is not true, they could or not release energy

occur without an input of heat This option is false, most of non-spontaneous reactions requiere heat to occur.

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.