Why did hunter-gatherers live in small groups instead of larger ones?

What is one early technological advance that shaped culture? a the use of fire b the discovery of arable land c family units. d migration

Which statement best explains the relationship between an area's geography and the temperature of its surface water? areas at low altitudes have the warmest water because they receive the most direct sunlight. areas at low altitudes have the warmest water because they have the least change in temperature throughout the year. areas at high latitudes have the warmest water because their days are the longest. areas at high latitudes have the warmest water because they have the longest seasons.

Which type of map gives the most information about what lies below the surface terrain ?