Solution: Parsley, basil, and dill are types of herbs. Mayonnaise is not an herb.

Solution: An ounce measures weight; the other choices measure length.

Solution: Tire, steering wheel, and engine are all parts of a car.

Solution: Tulip, rose, and daisy are all types of flowers. A bud is not.

Solution: Loaf, sourdough, and pumpernickel are types of bread. A rye is not a bread type.
Loaf - Bread that is shaped and baked in one piece and usually sliced before being eaten.
Pumpernickel - Dark, dense German bread made from coarsely ground whole-grain rye.
Sourdough - Leaven for making bread, consisting of fermenting dough, typically that left over 
from a previous batch.
Rye - A wheatlike cereal plant that tolerates poor soils and low temperatures.

Solution: The guitar, violin, and cello are stringed instruments; the flute is a wind instrument.

Solution: Dodge, duck, and avoid are all synonyms meaning evade. Flee means to run away from.

Solution: A branch, leaf, and root are all parts of a tree. The dirt underneath is not a part of the tree.

Solution: Freeway, interstate, and expressway are all high- speed highways; a street is for low-speed 
traffic.

Solution: Heading, body, and closing are all parts of a letter; the letter is the whole, not a part.