One farmer, for the convenience of tying cattle, hooped an iron ring on the trunk of an elm tree in the manor. As the elm tree grew, the iron ring slowly grew into the tree body, leaving a deep layer on the skin of the elm tree. Scars. A year later, the local elm disease occurred, and all elm trees that were tens of miles away died. Only the elm tree, which was hooped and left deep scars, survived. Botanist research found that it started from The rusted iron ring absorbs a large amount of iron before it becomes immune to the fungus. What is the truth of this text? ['a. Strong life can turn harm into wealth and strength.', 'Life creates amazing miracles in adversity.', 'Scars can sometimes become a nourishment for life.', 'Life is stronger, more energetic and hopeful in injury.']