Answer: D) explicit and implicit costs. Explanation:

Ionic bonding is a type of chemical bond in which valence electrons are lost from one atom and gained by another.. This bond generates two oppositely charged ions. In ionic bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion.   Example :: One example of an ionic bond is the formation of sodium fluoride, NaF, from a sodium atom and a fluorine atom. In this reaction, the sodium atom loses its single valence electron to the fluorine atom, which has just enough space to accept it. The ions produced are oppositely charged and are attracted to one another due to electrostatic forces.

Answer: B) included provisions for territorial growth and the admission of new states. Explanation: The Northwest Ordinance of 1787 was significant because it was the second continental congress that charted a government for territory in Northwest America. It also helped forbid slavery, and made a method of admitting new states near the Union.

Answer: C) Muslims Explanation: The followers of Islam religion is called Muslims.   According to Muslims, God sent prophets to mankind to teach them how to live according to His law. Muhammad is believed by Muslims to be the last prophet sent by God (Allah). The Muslim holy book is called the Quran.

Answer: C) unicellular Explanation: An organism is a living thing, and there are two broad categories of organisms: those made up of only a single cell, and those made up of multiple cells. Single-celled organisms means which contains only one cell are called unicellular organisms. 'Uni-' means 'one,' so the name 'unicellular' literally means 'one cell.'   Examples of Unicellular or Single celled organisms ::   Prokaryotic organisms like Bacteria,... Some algae like green algae, euglena,...

Answer: C) altered states of consciousness Explanation: Consciousness is the state or quality of awareness, or, of being aware of an external object or something within oneself.   Day dreaming, Meditation, Intoxication, Sleep and Hypnosis are all types of altered states of consciousness . In al these states, a person's state of conscious is altered but he has consciousness.

Answer: D) Agriculture Explanation: Agriculture would be a good example of a purely competitive industry.