Select the correct answer from each drop-down menu. ANSWER THIS ILL BRAINLIST There are four main types of economic systems in use today.
In a economy, people generally produce what they need to survive.
A economy is a system in which resources and means of production are controlled by the government.
In a economy, supply and demand dictate production, distribution, and investment decisions.
Finally, a combination of market and command systems is found in a economy, in which free markets exist with some government intervention.

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there are treatment options for depression (mdd) that may work for you. one way of treating depression may be to affect the levels of certain chemicals that brain cells use to communicate, called neurotransmitters. scientists believe that certain neurotransmitters may be out of balance in depression.

although the exact way depression medications shown to ease overall depression symptoms in some people work is unknown, scientists think that some medications work by affecting the levels of a neurotransmitter called serotonin in the brain. other treatments work by affecting the levels of other neurotransmitters like norepinephrine or dopamine.