Interpret culture-extension graphs in Paper 3

Psychology HL Paper 3 source booklet: The HL extension is culture within human relationships. Source A graph reports support-conversation score for low belonging support (63) and high belonging support (78) from 107 participants using a school survey with a five-item belonging scale. Source B reports the qualitative theme "students said shared language made advice feel less embarrassing" from 11 participants using semi-structured interviews with mentor pairs. Source C says an observation log shows more first-contact support in mixed-language mentor pairs. The claim is: "cultural belonging improves peer-support behaviour." Paper 3 Question 1 asks students to explain one issue that limits interpretation of the graph. Select the HL extension focus, source issue, data conclusion, and synthesis limit. Then answer this in your own words: what should the student write next to make this Psychology HL Paper 3 response stronger for the exact sources? AI will analyse your source interpretation, data reasoning, extension knowledge, research-method judgement, synthesis, and expression.