Which Word Doesn't Belong?

Front

Classify the following items: menu, table, waitress, shirt

Back

shirt

Front

Classify the following: math, shopping, reading, science

Back

shopping

Front

spoon, fork, plate, knife

Back

plate

Front

Classify: mountain, river, stream, lake

Back

mountain

Front

Classify the following: robin, blue jay, mouse, penguin

Back

mouse

Front

Classify the following modes of transportation: boat, airplane, helicopter, jet

Back

Watercraft

Front

Classify the following items: hot dog, hamburger, ketchup, chicken

Back

ketchup

Front

red, green, plant, orange

Back

plant

Front

friend, sister, brother, cousin

Back

friend

Front

clean, sad, happy, angry

Back

clean