Respuesta :
Answer:
Improvement in engines.
Explanation:
With time several changes were made in automobile sector to improve and enhance the performance of cars so that these changes can ensure more public safety and can help them to use these transport mode more efficiently.
Few changes which were made during the decade of 1970 and 1980 include:
- Superior fuel injection.
- Electronically controlled ignition.
- Six-Stroke Engines.
- Electric windows and doors.
- Catalytic converters, etc.
