Explanation:
The total population divided by available arable land area is referred to as agricultural density. It is a measure of the number of people who depend on a unit area of arable land for their food requirements. Agricultural density is an important indicator of the level of technological advancement and population pressure in a country.

Importance of Agricultural Density:

1. Technological Advancement: Agricultural density provides an indication of the level of technological advancement in a country. Countries with high agricultural density may indicate that the country is not technologically advanced, while countries with low agricultural density may suggest that the country is technologically advanced.

2. Population Pressure: Agricultural density also provides an indication of population pressure. Countries with high agricultural density may indicate that the country has a high population density, while countries with low agricultural density may suggest that the country has a low population density.

3. Food Security: Agricultural density is also used as an indicator of food security. Countries with high agricultural density may indicate that the country is dependent on a small area of arable land for its food requirements, while countries with low agricultural density may suggest that the country has a surplus of arable land and can produce enough food to meet its requirements.

Conclusion:
In conclusion, agricultural density is an important indicator of the level of technological advancement, population pressure, and food security in a country. By measuring the number of people who depend on a unit area of arable land for their food requirements, agricultural density provides valuable information that can be used to inform policy decisions related to agriculture and food security.