All plant and animal groups existing together and the physical factors with which they interact compose an ecosystem<span>.</span>
Im so confused i would help you i just need a better understanding.<span />
<span>Dinosaurs were common in the Jurassic period, but during the Cretaceous period they went extinct. Pangaea had fully split by the Cretaceous period and angiosperms had developed. Hope this answers the question. Have a nice day. Feel free to ask more questions.</span>
The correct answer is: None of the above
Soil formation is affected by many factors that include time, climate (temperature, precipitation), relief, mineral organic materials.
• Precipitation is part of the climatic factors. Precipitation refers to the amount of water (in the form of rain, snow) that a soil gets. Thus, it is one of the most important factor that determinates the formation and characteristics of soil. Precipitation affects both, the amount of erosion and weathering (breakdown of rocks and soil) that occurs.
• Time. It refers to changes of soil as it age. For example, older soils contain more organic matter and are more exposed to moisture and other environmental factors that may change their features.
• Erosion is removal and transportation of material from the Earth’s crust as a consequence of natural processes such as wind or rainfall. Because it includes the removal of the soil it affects its formation.