The tree would get sunlight. The tree would provide shelter for birds. The sidewalk might crack as the tree grows. The temperature of the sidewalk would drop.
Which is the best reason for planting a tree away from a sidewalk?

Options:
- The tree would get sunlight.
- The tree would provide shelter for birds.
- The sidewalk might crack as the tree grows.
- The temperature of the sidewalk would drop.

The sidewalk might crack as the tree grows.