Here’s the correct matching of the items:
- connected Charleston and Hamburg - South Carolina Railroad
- connected Albany and Schenectady - Mohawk and Hudson Railroad
- Tom Thumb - Engine built by Peter Cooper in 1830
- governor of New York who built the Erie Canal - DeWitt Clinton
- made New York City a leading port - Erie Canal
- connected Philadelphia and Pittsburgh - Pennsylvania canals
- completed in 1834 - Erie Canal
It seems that the Erie Canal is mentioned in both 5 and 7, but for clarity, I've matched it with both as appropriate.