Answer:
Galena
Explanation:
Galena usually occurs in cubic crystals. If you hit a specimen of galena with a hammer it will shatter into small perfect cubic crystals. It has a metallic luster and a black to dark gray color and streak. Galena has a hardness of about 2.5 on the Mohs hardness scale which is about as hard as your fingernail.
Hepatitis I think..........
The procedure that is known to being applied in the follow up study of children who displayed high anxiety symptoms is known as option D: Operant conditioning.
<h3>What is meant by operant conditioning in psychology?</h3>
Operant conditioning is a term that is often called instrumental conditioning.
It is regarded as a kind of process where humans and animals are said to learn how they can behave in a way as to be able to get a rewards and also to avoid punishments.
Note that It is also the name for an experimental psychology where there is such learning and action selection acts are been studied.
Therefore note that The procedure that is known to being applied in the follow up study of children who displayed high anxiety symptoms is known as option D: Operant conditioning.
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See full question below
Which procedure is being applied in the follow-up study of children who displayed high anxiety symptoms?
A. Extinction
B. Spontaneous recovery
C. Classical conditioning
D. Operant conditioning
