Final answer:
The lack of manual dexterity is likely to hold Gemma back as a cosmetologist.
Step-by-step explanation:
The lack in manual dexterity is most likely to hold Gemma back as a cosmetologist. Manual dexterity refers to the ability to use the hands skillfully, which is crucial in performing delicate makeup techniques and applications. Since Gemma is extremely clumsy when she gets excited, her lack of manual dexterity might hinder her ability to execute precise and intricate makeup looks.
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