A landslide is a natural hazard that is usually related to the instability of a slope. Human activities can directly influence the occurrence of landslides. All but one would be considered a human cause. That is .

Select one:
a. excavation
b. weathering
c. deforestation
d. mining

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

Apart of an ecosystem that can restrict the growth of a population is referred to as

What is the surface temperature of the ocean where hurricanes form? greater than 80 celsius approximately 27 celsius at least 76 celsius less than 10.5 celsius