Simply the following
1. Cling wrap is suitable for wrapping sandwiches because it is airtight and keeps the sandwich fresh.
2. Plywood is not suitable for wrapping sandwiches because it is not flexible or food-safe.
3. Paper is suitable for wrapping sandwiches because it is lightweight and can be easily disposed of.
4. Wax wrap is suitable for wrapping sandwiches because it is biodegradable and can help keep the sandwich fresh.