Question

aside from words or symbols, what are other forms that trademarks may come in?
ideas, brainstorms, thoughts
smell, sound, color
intuitions, vibrations, methods
feelings, emotions, blueprints

Explanation:

Trademarks can be in non - traditional forms. Smell, sound, and color can be registered as trademarks under certain conditions, while ideas, intuitions, feelings etc. are not typical trademark forms.

Answer:

smell, sound, color