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motive
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observation
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reaction
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stimulus
The cue or combo of cues that produces a response is called a 
, which is a thing or event that causes a specific reaction in an organ or tissue.
The answer is
"Dopamine".
<span>Some drugs fundamentally influence one neurotransmitter or
class of neurotransmitters. For instance, prescription opioids and heroin
deliver impacts that are like (however more articulated than) those created by
the neurotransmitters endorphin and enkephalin: expanded absence of pain,
reduced readiness, and low breath. Different medications upset more than one
sort of neurotransmitter. Cocaine, for instance, joins to structures that
manage dopamine, prompting increments in dopamine activity and creating
euphoria; it likewise delivers changes in norepinephrine and glutamate
frameworks that cause stimulant impacts.</span>
Answer:
mineral -
This is any element or inorganic compound. It is a naturally occuring solid chemical compound found in pure form. It is commonly found within rocks.
metal -
an element known for is lustrous, opaque, and malleable properties. Metals are good conductor of heat and electricity.
ore -
This is a natural rock from which minerals, elements or metals can be extracted through mining.
alloy -
An alloy is a group of metals or metals that have one or more other elements. Take for example, red gold is a combination of gold and copper while white gold is a combination of silver and gold.
The correct answer is option (a) Scanning tunneling microscope.
Microscopes are used to see the objects at molecular level. Scanning tunneling microscope( STM) is a type of optical microscope that uses optics(light) and lenses to see the enlarged size of the object. This microscope use a small metal tip under a high voltage. when this tip of microscope is brought close to the metal, the metallic tip of microscope draws electrons from the atom (metal) to be observed. This generates an electric current. There is a computer system attached to the microscope that detects the change in the electric current. Computer plots the change in position of atoms in metal.
Answer: Heat or thermal energy coming from the sun provides energy for living organisms through heat transfer. For plants light energy is absorbed by the leaves and enters the stomata which activates the thylakoids and releases amount of electrons for chemical reactions. Through light energy plants produces glucose and releases oxygen gas as a by-product of the reaction. For this process energy is formed (ATP)
Explanation:
