Answer:
every answer of yours is correct
Answer:
A gas-powered lawn mower is a complex machine because for it to function it does more than one motion. For example, it has a wheel and axle system so it can move when powered. And it has a system of simple machines and other parts that are put together to accomplish the task of cutting grass.
Explanation:
A warm air does always rise and cold air falls
The correct answer would be through adaptation and eventually over time they had to evolve to the area around them which made them develop over time to have longer necks .
