Final answer:
The question asks for an inference about Heidi's grandfather based on paragraph 7, but without the text, it is impossible to provide a factual answer. To infer, one would need to look for context clues within the paragraph that suggest one of the provided characteristics.
Step-by-step explanation:
The student's question asks about inferencing a particular characteristic of a character named Heidi's grandfather from the seventh paragraph of a provided text. Since the text related to the question is not included, it is not possible to accurately infer whether Heidi's grandfather loved gardening, was a strict disciplinarian, had a secret hobby, or lived a long and fulfilling life.
However, the method to infer such information is by closely reading the text and looking for clues that suggest any of these characteristics. Was he mentioned working in a garden or admiring plants? That might indicate a love for gardening. Were there mentions of rules, discipline, or strictness in his behavior? That could suggest he was a disciplinarian. If the text hints at activities he did not openly share, that could point to a secret hobby. Lastly, references to his longevity or satisfaction with life might imply he lived a long and fulfilling life.
To make a valid inference, one would need the specific context provided in paragraph 7, which is not provided here.