Arecent study by specht, egloff, and schukle found that showed a continuous increase from early adulthood to late adulthood

- Conscientiousness.

Explanation:

'Conscientiousness' is described as the personality trait that implies a thorough, determined, vigilant, and self-disciplined attribute to perform and achieve. It is a trait that is governed by an individual's conscience and promotes a responsible, organized, and goal-oriented performance. This is the trait the enhances with time and as one grows older their 'conscientiousness' improves.

As per the question, Specht, Egloff, and Schukle's study reflects that 'conscientiousness' increases from the early adulthood stage to late adulthood as with the growing age people learn from their experiences and become more stable, disciplined, and disillusioned over time and thus, are able to see their goals more clearly now. Thus, 'conscientiousness' is the answer.

answer; with few regulations protected the prices of crops which made farmers leave their farms and migrate to the big cities to work in factories;

answerjames-lange theory;