Which can be viewed as an effect size indicator?

Which can be viewed as an effect size indicator? Options: (a) r² (b) Eta² (c) Omega² (d) All above ✅ Correct Option: (d) All above Explanation (200+ words): All listed statistics measure effect size, showing strength of relationships or group differences. 10 PPSC-Related Facts: 1. r² shows variance explained 2. Eta² used in ANOVA 3. Omega² less biased 4. Effect size measures strength 5. Used beyond significance 6. Important for interpretation 7. Reported in research 8. Used in social sciences 9. Exam-relevant statistics 10. Indicates practical significance