IWhich invention created during the Second Industrial Revolution was the most effective, both during the first few years it existed and in the long term?

Combustion engine

Explanation:

The combustion engine were some of the most significant and very far technologies of the Industrial Revolution. This was first presented in 1878 and was propelled by gas and air, making it unsuitable for large public use. During the Industrial Era, the combustion engine was perhaps the most efficient, both in the early years and even in the long run.

yes

it is because 3 because the citizen the northern democratic party watned the warning on red to blue because it is purple. lol

muslims have taken his goods and products to different parts of asia an indonesia. sometimes just traveled and trade, but in other occasions, stayed in the place and made a living.

trade was the key for muslims economies to prosper. their commerce routes reached far places like malaysia and java in the 11th century.

another important factor for prosperity was that muslim states served as the middle point for european traders.

they used to travel by land but sailing the seas -the indian ocean- really increase the exportation of products.