Question

what groundbreaking invention was produced by thomas edison and became a symbol of progress? light bulb telephone steam engine

Explanation:

Thomas Edison is widely known for inventing the light bulb. The telephone was invented by Alexander Graham Bell. The steam engine had earlier inventors and developers like James Watt (improving it) but not Edison. The light bulb's invention revolutionized lighting, enabling longer working and living hours, and became a symbol of technological progress.

Answer:

light bulb