Answer:
They can move about freely.
They can reproduce.
They can respond to internal stimulus.
Yes. For example, when you have a flute and you have a clarenet right next to each other and they are playing, you will notice that the clarenet is deeper than the flute.
The greenhouse effect is a naturally occurring process that aids in heating the Earth's surface and atmosphere. It results from the fact that certain atmospheric gases, such as carbon dioxide, water vapor, and methane, are able to change the energy balance of the planet by absorbing longwave radiation emitted from the Earth's surface. Without the greenhouse effect life on this planet would probably not exist as the average temperature of the Earth would be a chilly -18° Celsius, rather than the present 15° Celsius.
The answer to this is Tissue.
