Corrected sentences:
- In dry grasslands, animals learn to run fast and hide in the tall grass.
- Burrows help animals escape strong winds, stay warm in winter, and cool down in summer.
What I changed and why (simple):
- The first sentence is fine as it is. It tells us that animals run fast and hide in the tall grass.
- In the second sentence I added a comma before and to make the list of two things clearer: burrows help animals stay warm in winter, and they help animals cool down in summer. The comma makes the sentence easier to read.
Both sentences are now grammatically correct. Try reading them out loud to hear how they sound.