I'm not sure what definitions you're given to choose from here, but an abiotic substance or object is something that's not associated with or derived from living things. An example of this would be water, an abiotic, inorganic substance. Something biotic, on the other hand, does result from living things -think organic, like green plants and furry animals.
Hope this helps!
Answer:
Push factors of migration include all of the following, except __________.
Explanation:
Formation. Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula—a spinning, swirling disk of material. Approximately 4.6 billion years ago, the solar system was a cloud of dust and gas known as a solar nebula. Gravity collapsed the material in on itself as it began to spin, forming the sun in the center of the nebula. With the rise of the sun, the remaining material began to clump together. Part of Hall of the Universe. The Sun and the planets formed together, 4.6 billion years ago, from a cloud of gas and dust called the solar nebula. A shock wave from a nearby supernova explosion probably initiated the collapse of the solar nebula. ... In a similar manner, moons formed orbiting the gas giant planets. Hope this helps!
Many more animals than usual are grazing on a limited amount of land. This overgrazing causes a loss of vegetation—when herds of animals eat all the grass on a piece of land, the soil underneath is left vulnerable and unable to grow back quickly enough to meet the grazing demand of the livestock. People can’t live in these territories anymore and they can’t produce food and other stuff they need for life there. Desertification mostly affects rural households who are forced to depend on natural resources for their livelihoods. More so, drought and desertification lead to the migration of people to urban or other areas to engage in economic activities such as farming, grazing and fishing. This situation leads to severe economic crisis and poverty.