The ability to build and use watercraft probably evolved very late in Homo sapiens evolutionary history, and was certainly not part of an early archaic Homo sapiens toolkit. Identify the possible explanations for the presence of archaic Homo sapiens sites on Southeast Asian islands such as Java.

The ability to use watercraft was not developed in very early humans. Therefore, archaic Homo Sapiens could not have taken advantage of this in order to get to islands such as those of Australia or Java. However, there is considerable debate as to how humans arrived to these regions.

The most likely answer is that humans arrived to many of these regions during the closing stages of the Pleistocene. During this time period, glaciation was common, which led to particularly low sea levels. These connected many territories that are now separate (such as New Guinea and Tasmania, which were connected to Australia). It also meant that islands were much closer to each other. Early humans appeared to have reached these areas through "island hopping." It is also possible that these movements were accidental, as a result of tsunamis and other natural events.

levels of production can be increased by technology while holding labor and capital constant, because increased technology makes the production process more efficient. subsequently, the lras curve is almost a vertical line, that can shift to the right, with an increase in technology.

the relationship between the lras curve and the ppc is that both can make the economy could grow. the ppc achieves that when it shifts outward because of more resources or technological advances while the lras curve shifts if more resources are developed or if there are technological advances.

the lras curve is a vertical line at an output level that represents the number of goods and services a nation can produce over a sustained period using all of its productive resources as efficiently as possible with all of the current technology available to it.

the production possibilities frontier (ppf) is a graphical device that is used for economic analysis of production decisions because the ppf measures the maximum possible combinations of two goods that an economy is capable of producing with its currently available resources and technology.

i need more info !