question: calcium:osteoporosis
choices.label: A B C D
choices.text: sugar:diabetes water:wither patience:education weight:gravity
explanation: "osteoporosis" is caused by a lack of "calcium". "diabetes" is caused by too much "sugar", not a lack. "wither" is caused by a lack of "water". "patience" is needed to "educate" children. lack of "patience" will lead to some consequences of "education", but the corresponding method is different from the question. there is no obvious logical relationship between "weight" and "gravity".
relation: calcium osteoporosis R5.1
relation: sugar diabetes R5.1
relation: water wither R5.1
relation: patience education R3.10