Sand #1

 

Item #1:
Flying rats all around
Get a photo of one out of reach
Or a photo of one on the beach

Answer: Seagull

Item #2:
An empty home left alone
Not cheese, not a potato
Of this type of shell, you need a photo

Answer: (Any intact) Seashell

Item #3:
Not necessarily obsidian
But something dark and hard as can be
Of this the photo should be

Answer: Dark rock