Final answer:
The British government decided to repeal most of the Townshend Acts because the protests against the acts were hurting the British economy.
Step-by-step explanation:
One reason why the British government decided to repeal most of the Townshend Acts in March 1770 was because the protests against the acts were hurting the British economy. The colonists' boycott of British goods and protests against the Townshend Acts had significantly impacted the trade between Britain and the American colonies. Merchants in Britain were losing revenue as a result, and this economic pressure played a role in the decision to repeal the acts.
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