Hi there!
This would be the <u>convection in Earth's mantle.</u>
Let me know if you need more help :)
Explanation:
waterfalls are temporary features of rivers because stream erosion is greatest at waterfalls and rapids. The water that falls at the base of the waterfall erodes rock there, leaving the rock at the tops of the waterfalls to overhang. Overall, undermining causes waterfalls to recede farther upstream.
Answer:
Auxiliary data from existing landcover charts, aerial photos, photography, or AVHRR can also be used in conjunction with field visits to improve map precision predictions. This improvement in precision is achieved by the use of an improved prognosis widely used in polling surveys.
Explanation:
With no additional problems in the research methodology without any unnecessary field visits, basically major increases in performance can be achieved. The first and only additional cost of obtaining the auxiliary data is incurred. The time of loss could be used with the random sample or systematic selection when the intermediate process is available throughout the region defined by the map of the land use/cover.
Gems are more valuable than regular minerals
If I remember this correctly, I believe the answer is D