Answer:
In a planned economy, a central authority determines who buys goods and services. In a market economy determines who buys these products.
Explanation:
In a planned economy, the market has a secondary role for the allocation of resources.
Market economy is understood as the organization and allocation of the production and consumption of goods and services arising from the interplay between supply and demand.
An organism that lives in or on another organism often with harmful side effects but without benefits is a parasite.
Electron cloud is the region around the nucleus in an atom where we can locate an electron.
The concept of electron cloud model was introduced by the Schrodinger and Heisenberg. According to this model, it would be difficult to know the position of the electrons in an atom and they are not particles that orbit around the nucleus. We can only expect the electrons to be present in specific areas called the electron clouds around the nucleus. It is the quantum mechanical model that used the concept of electron clouds. According to the model, the electron cloud or an orbital is a space around the nucleus in an atom where the probability of finding an electron is 90%. It explains that electrons show wave nature. It is difficult to determine the exact position and momentum of an electron in an atom.
The answer to your question is A