The correct option is all of the above.
When the production possibility curve shifts shifts inwards, it means that there is a negative effect on the economy and as such the economy is shrinking due to the fact that the allocation of resources is not efficient.
Based on the options given, some of the reasons that will cause the PPC to shift in, closer to the origin include:
- a natural disaster that destroyed resources,
- a plague that resulted in widespread death.
In conclusion, all of the options are correct.
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<span>They inferred that the Appalachian Mountains have been eroding for millions of years.</span>
Animal cells<span> do not have a </span>cell<span> wall or chloroplasts but </span>plant cells<span> do. </span>Plant and animal cells<span> are both eukaryotic </span>cells<span>, so they have several features in common, such as the presence of a </span>cell <span>membrane, and </span>cell<span> organelles, like the nucleus, mitochondria and endoplasmic reticulum.</span>
Prejudice = attitudes
Discrimination = actions