Final answer:
The correct translation for 'My brother is very skinny' in Spanish is 'Mi hermano es muy flaco'.
Step-by-step explanation:
My brother is very skinny. The correct translation for this sentence is Mi hermano es muy flaco. The word 'hermano' means 'brother' and 'es' means 'is'. 'Muy' means 'very' and 'flaco' means 'skinny'.
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