Good job noticing this sentence! Here is a clear, simple fix and an explanation you can understand.
Corrected sentence (best):
One day, her mother packed a basket with a cake and a jar of honey for her grandmother, who lived deep in the forest.
Why this correction?
- Original phrase: "packed a basket of cake" — sounds odd. If there is one cake, say "a basket with a cake." If there are many cakes, say "a basket of cakes."
- Original phrase: "to her grandmother" — the preposition "to" is wrong after "packed." Use "for her grandmother" (meaning she packed it for Grandma) or say "to take to her grandmother" if you mean she carried it to Grandma.
- The rest is fine: ", who lived deep in the forest" correctly describes the grandmother.
Other good versions:
- One day, her mother packed a basket of cakes and a jar of honey for her grandmother, who lived deep in the forest.
- One day, her mother packed a cake and a jar of honey to take to her grandmother, who lived deep in the forest.
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