Answer and Explanation:
South Africa is said to be the place rich in minerals. Regardless of its rich mineral resources and valuable minerals wealth, it is a land denied of sustenance. Destitution wins in this nation, People are denied from numerous different backgrounds. Some essential reasons are:-
- Lack of administration: The most genuine explanation behind such a condition. This prompts the working of a confused government.
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Corruption: African locals are a prey to broad debasement. This debilitates the organization and acknowledges preference.
- Tribalism: Africa is a place that is known for tribal. Individuals distinguish themselves as clans, which decreases their job opportunities
- Lack of skilled workers: The Government can't pay to talented laborers. Consequently they secure positions in Western Countries.
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Neocolonialism: It tends to be characterized as the continuation of the monetary model of expansionism after a colonized region has accomplished formal political freedom.
A. A was deposited most recently in the diagram above, as it is located in the top, showing that is the newest layer to be added.
Answer:
The heat equation can be written as. ∂ u ∂ t = α ∇ 2 u. where u(x, y, t) is the temperature field that varies in space and time, and α is the thermal diffusivity constant.
The Correct Answer : <u>Flooding the fields causes the soil to degrade so weeds cannot take root.</u>
Rice has a submerged growth state while most weeds do not. Therefore, flooding rice fields reduces the growth of these less robust pests without negatively affecting the rice crop. Flooding the fields also deters many kinds of vermin that would otherwise live in the soil and harm the rice plants because they cannot breathe underwater.
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<h3>What is Pesticides?</h3>
Pesticides are chemicals that may be used to kill fungus, bacteria, insects, plant diseases, snails, slugs, or weeds among others. These chemicals can work by ingestion or by touch and death may occur immediately or over a long period of time.
<h3>What is Herbicides?</h3>
Herbicides are used to kill undesirable plants or “weeds”. Some herbicides will kill all the plants they touch, while others are designed to target one species.
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Therefore, we can conclude that the correct option is B.
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Tropical places are hot because the humidity coming from the moisture of the plants and water are heated by the sun on the top layer of the tropical zone. The climate varies little in rain forest. There are five layers in the tropic trees so it's so thick that barely any light come through. This is also why vines grow up the trees so they can reach the sunlight to get nutrients. Also, the tropics are near the equator and that also causes the heat. The polars are cold because they barely get any sun heat to melt the snow or warm it up. The polars are melting due to certain chemicals and gasses in the atmosphere. also known as global warming. Hope that was helpful!
