Explanation:
The propensity to save is the proportion of income that is saved by households. It is an important determinant of the level of investment in an economy and, therefore, the level of economic growth. The factors that influence the propensity to save are:

Level of Income
The level of income is the most important factor that influences the propensity to save in an economy. As the level of income increases, the propensity to save also increases. This is because as income increases, people tend to save a higher proportion of their income.

Level of Consumption
The level of consumption is another important factor that influences the propensity to save. As the level of consumption increases, the propensity to save decreases. This is because when people consume more, they have less money left over to save.

Level of Investment
The level of investment is also an important factor that influences the propensity to save. When the level of investment is high, the propensity to save is also high. This is because when people see opportunities for investment, they tend to save more money to invest.

Level of Savings
The level of savings is also an important factor that influences the propensity to save. When the level of savings is high, the propensity to save is also high. This is because when people have a high level of savings, they tend to save more money.

Conclusion:
Therefore, we can conclude that the most important factor influencing the propensity to save in an economy is the level of income. As the level of income increases, the propensity to save also increases. Other factors such as the level of consumption, investment, and savings also play a role in determining the propensity to save, but they are secondary factors.