Answer: A steam engine is an external combustion engine (ECE) in which the fuel is combusted outside of the engine, unlike an internal combustion engine (ICE) in which fuel is combusted inside the engine. ECEs have a lower thermal efficiency, but carbon monoxide production is more readily regulated.
D. lung cancer is the most common cause of cancer death.
<span>During an earthquake, it is important to seek protection from windows and hanging objects. These objects could fall at any moment during an earthquake, which could result in harm to people nearby. Ultimately, the most important things are to drop to the ground, cover your body, and hold on to stable objects.</span>
I am pretty sure that the answer on the first question is poverty, because most rural areas are not as developed as towns.
The second one best matches with physical health, because the physical state has the strongest positions in lige of every alive being.
The next one is the option ''doubled''.
