Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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you agree to defend and indemnify tripadvisor and its affiliates and any of their officers , directors , employees and agents from and against any claims , causes of action , demands , recoveries , losses , damages , fines , penalties or other costs or expenses of any kind or nature including but not limited to reasonable legal and accounting fees , brought by third parties as a result of : 

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. OPTIONS: ['Choice of law' 'Content removal' 'Limitation of liability'
 'Contract by using' 'Jurisdiction' 'Arbitration' 'None'
 'Unilateral change' 'Unilateral termination'].