The best answer for this question would be:
2. Cosmic Background Radiation
The Cosmic Background Radiation are when the heat of a planet is measured by the left over heat of it. This is based on the “Big bang Theory” wherein the planets were formed because it was once a very hot radiation.
<span>
</span>
Mostly fractures than cleavage
Subsoil: This layer has normally less organic matter than the A horizon, so its colour is mainly derived from iron oxides. Iron oxides and clay minerals accumulate as a result of weathering. In a soil, where substances move down from the topsoil, this is the layer, where they accumulate.
Note: This information has been taken out of a website.
Gondwana<span> was an ancient supercontinent that broke up about 180 million years ago.</span>
<span>it was a source of food and trade</span>
