In a multiple regression which variable is most associated (even if not significant)

The question is presented in pink in the picture below. I have conducted the analysis and answers. However I am not sure what answer the question is asking me to report. Could you please tell me does sr or tolerance indicate the most associated variable?

Would I say?

REWARD was the best, and most statistically significant, predictor of sIgA, sr = .27, t(3, 62) = 2.412, p = .019.

or

REWARD displayed the highest level of tolerance .956

Would I display a table of individual contributions to answer this question.

I just need some clarification as to what Q.6 in pink writing below is asking. (I added the output after the question) Thank you

Q6. Researchers are interested to know if it is the enduring dispositional characteristic of OC 06. that best explains lower slaA concentration or if it is due to efforts or rewards. Conduct a regression analysis and detail which variable is most associated (even if not significant) with STEA Multiple Regression of OC predicting sled Regression of OC, EFFORT and REWARD Predicting Concentration of SigA Coefficientsa Unstandardized Standardized Collinearity Coefficients Coefficients Correlations Statistics Std. Zero- Model B Error Beta t Sig. order Partial Part Tolerance VIF 1 (Constant) 21.785 4.160 5.237 .000 OC -.357 207 .201 .090 -.222 -.214 921 1.085 1.72 193 EFFORT -.428 .179 278 .020 -.355 -.290 928 1.077 2.385 .267 REWARD .235 097 277 2.412 .019 .280 .293 .270 .956 1.046 a. Dependent Variable: sIgA The Individual Contributions of OC, EFFORT and REWARD ST B t P OC -.222 -. 193 0.201 -1.721 090 EFFORT -.355 -.267 0.278 -2.385 .020 REWARD .280 .270 0.27 2.412 .019