I believe the answer is D) a social movement.
Answer: C. The economy is characterized by dynamic change and imperfection.
Explanation: The natural rate of unemployment can be explained as the limit on the lowest or minimum level of unemployment a nation can achieve from standard resources or output. It has often been argued that even in healthy economies the natural rate of unemployment cannot be zero due to factors such as flexibility, technological replacement and some who lack the required skill to be employed, imperfect information. Flexibility or dynamic nature of the market affords individuals the opportunity to change or swap jobs, fresh graduate who may need a bit of time to find jobs, recession characterize the dynamic nature of the economy, imperfection in information in capital and labor market is also a contributing factor.
Answer:
Option D is correct - The Harappan civilization fell to Aryan invaders.
Explanation:
Option A is not correct as we were not able to decipher their letters yet.
Option B is not correct as Harrapan civilization didn't managed to develop outside the borders of Ancient India, while Egyptian civilization affected many regions, including Middle and Near East.
Option C is not correct because the cities of Harrapan civilization were regarded as the largest and most developed cities of the time.
D is correct as after the collapse of civilization invaders from the North came and started a new period, known to us as Vedic period.