Answer:
Global cities create a network of international relations and connections in the following ways:
Explanation:
- Global cities lead to development of transport mechanisms between them, this in turn enables connection between people in terms of economic, social and political reasons.
- Global cities are actors in the global market, this leads to heathy diplomatic ties between people in their respective states; for business to happen, then peace must prevail.
- Global cities also compromise the health of global political, social and economic relations especially when there arizes competition among them.
- The peoples of the world get to interact as a result of global cities which bring people from all corners of the world together.
Sources of error are basically sources of uncertainty in your measurements. Every measurement, no matter how precise we believe it to be, contains some uncertainty simply because of how we measure it.
Answer:
Something that is persistent remains over time; this is a key characteristic of DDT, which also happens to be a pollutant/pesticide. DDT is able to persist in an environment (as a pollutant) in part due to a phenomenon known as biological magnification. In simpler terms. once DDT enters an ecosystem/trophic structure, it gets worse as you go up the trophic levels; in other words, this means that the worst effects/concentrations of the pesticide will be felt in the uppermost trophic levels (your consumers rather than producers).
The basis for this, however, lies in the fact that organisms of a trophic structure/ecosystem consume each other; they feed on each other to survive (e.g. consumers feeding on producers, higher-level consumers feeding on lower-level consumers, etc.). Thus, once DDT gets into an ecosystem, it can only persist and spread in that ecosystem. Hope this helps :)
Science says that dead stars become neutrons when they die. Neutron stars are characterized by having a small radius with a high density. Protons and electrons are compressed in a very tight space making it highly dense. As it gets more compresses, it causes implosion in the form of shockwaves called supernova.
So the correct answer is C.
Hope this helped
