Great job! Here are small corrections and simple reasons why:
Corrected sentences:
- The sneaky lynx walks very quietly on its soft, padded paws.
- The lynx's cute ear tufts help it pick up the slightest rustle.
Why these changes:
- quietly — We use an adverb (often ending in -ly) to tell how the lynx walks. "Quiet" is an adjective; "quietly" tells how it walks.
- soft, padded paws — Two adjectives can describe the paws. Putting a comma between them sounds natural.
- The lynx's — Adding 's shows the ear tufts belong to the lynx. Then we use it to mean the lynx.
- Periods and capitals — Each sentence starts with a capital letter and ends with a period. Good!
Both original sentences had good ideas — these small changes make them grammatically correct and clear.