Here are the possible causes and effects sorted under "Electricity" and "Railroads":
ELECTRICITY:
- Light bulb led to more production
- Made manufacturing more efficient
- Bessemer process made steel stronger and cheaper for building materials
RAILROADS:
- Provided farmers and manufacturers access to near & far away markets
- Made the transcontinental railroad possible
- Allowed Americans to settle the west
- Total or near-total control of an industry by one company
Feel free to adjust or reorganize if you need a different arrangement.