Answer: Sex ratio
Explanation: The sex ratio or the gender ratio, as some argue, because according to some scientists these two terms are not interchangeable, is the ratio between the number of men and the number of women in the population. This ratio varies and depends on the type of society, i.e. it depends on economic, social, cultural, biological and technological conditions. The ratio of genders in the population, that is, the number of men and women can be affected by migration, higher mortality in some of the gender, as well as the average length of the life of the genders.
I would say the following:
1) access to food and water. This means that they should be next to water sources (rivers) and fertile ground
2) construction material: wood and/or stones
I would say that a location on a trade route would also be beneficial (and rivers were trade routes: this explains why so many cities were on rivers!)
For independace from britan
