What is defined as "an uncertainty that could have a positive or negative effect on the project objectives", and second, what is a "chosen state of mind, mental view or disposition with regard to a…

Response refers to a planned action taken in reaction to a risk event and does not describe a mental disposition or chosen state of mind, so it does not match the second definition.

Risk is formally defined as an uncertain event or condition that, if it occurs, has a positive or negative effect on one or more project objectives; Attitude is defined as a chosen state of mind, mental view, or disposition toward a fact or state, distinguishing how individuals perceive and respond to risk exposure.

Opportunity refers specifically to an uncertain event with only a positive effect on objectives, while the first definition explicitly includes both positive and negative effects, making Risk the correct first term.

Opportunity does not encompass negative effects as stated in the first definition, and Response does not describe a mental disposition as required by the second definition.