Decrease, wind will eventually erode them. (Though this will take a VERY long time.)
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Mountains can both increase and decrease in size over time. Factors such as tectonic plate movement, erosion, and volcanic activity can lead to the growth or reduction of mountain size. Overall, the net effect of these processes determines whether a mountain increases or decreases in size.
An increase in the availability of food, a decrease in predation pressure, or an improvement in reproductive success are factors that can lead to an increase in the size of an animal population.
An increase in predation pressure or a decrease in food availability are factors most likely to result in a decrease in the size of a specific population. These factors can lead to increased mortality rates and reduced reproductive success, ultimately causing the population to decline in numbers.
The size of a population can get larger with no influences from migration if birthrate is greater than the death rate. This results in a natural increase in population size due to more individuals being born than those dying.
The land elevation generally increases as you move inland from the coast. This is because coastal areas are often lower in elevation compared to inland areas that can be higher in elevation, such as mountains or plateaus.
Population change refers to any increase or decrease in the size of a population, whereas population growth specifically refers to the overall increase in the population size over a given period, often expressed as a percentage. Population change can be influenced by factors such as births, deaths, immigration, and emigration, while population growth focuses on the net increase in population size resulting from these factors.