Answer:
c. are renewable
Explanation:
There are many energy sources that the humans have learned to use and exploit. Some resources are non-renewable, while some a re renewable. The non-renewable tend to be cheaper for the time being, and they also tend to produce more energy, but the problem is that the reserves will eventually run out. On the other side, the renewable resources are constantly out there, and they can not be spent, which gives them the advantage on the long run.
The alternative energy sources have been more and more in the focus, especially when it comes to the more developed nations. The main reasons for this are that the fossil fuels will eventually run out, and that they are more environment friendly. This has led to development of technology that is able to harvest energy from the sun, water, and wind, all which are natural resources that are constantly present and can not be spent. Some nations have invested so much in these resources that they have gradually started to replace the fossil fuels, with the end goal being stopping the usage of the fossil fuels totally.
Many could actually occur-
mountains or islands though are the main!
Answer: contour lines.
Topographic maps are easily recognized by their contour lines.
Answer:
Forests is one of the most important resources for the human beings. we depend upon forest to survive,from the air we breathe to the wood we use is is from forests. beside providing habitats for animals and livelihoods for human, forest also prevents us from different kind of disasters such as landslide, soil erosion etc
Answer:
Molecule
Explanation:
A molecule is a term that refers to the smallest unit of a molecular compound with the properties of the compounds.
Molecules are like what atoms are to elements.
Every molecule of a compound possess the unique characteristics of the compound thereby typifying it.
The term molecule is often used to denote a covalent compound with a discrete or separate unit.
