Which noun is in singular form?
Bats
Bat
Bat
Phones
Phone
Phones
Dogs
Cowboy
Cowboys
Cowboy
Bears
Bear
Bears
Cat
Cats
Book
Books
Book
Apple
Apples
Apples
Foxes
Pencil
Pencils
Pencil
Grape
Grapes
Grapes
Boy
Boys
Markers
Marker
Marker
Pumpkin
Pumpkins
Pumpkins
Baby
Babies