Answer:
Locations along rivers meant faster travel upstream and downstream to rule territories. The city became the place where the ruler or rulers lived together in a stationary spot. The city's location along early rivers encouraged stronger government, which in turn encouraged stronger cities.
Well there would be an over population in the lizards food source aka bugs and whatever is eating the lizards like different types of bird and snakes would starve doing to lack of food
Endocrine glands are responsible for Regulating body activities.
Niche diversity refers to the evolutionary process in which species diverge in order to take advantage of open niches in their environment. This can also be seen in species that are somehow threaded from a common ancestor they share.Hope this helps:)
1.It deals only with natural phenomena and explanations , With science to answer real world mysteries.
2. They Grab Information to gain Hypothesis , Then test it to get the Scientifical Answer for the problem.
Hope this helps