In evolutionary theory, adaptation is the biological mechanism by which organisms adjust to new environments or to changes in their current environment. ... This enables better survival and reproduction compared with other members of the species, leading to evolution.
Answer:
When air temperatures are high, some heat is added to the stream directly from the air (known as convection). Simultaneously, this warmer air causes more evaporation. Because energy (heat) is used to evapo- rate water, heat energy is lost from the stream when evaporation occurs, thus cooling the stream.
Explanation:
It’s not my answer. I got it from google
The correct answer is - A. Leaders in chiefdoms relied on generosity, gift-giving, or personal charisma.
The chiefdoms were a very widespread type of social organization in multiple areas in the world until relatively recently. The majority of Africa, Australia and Oceania, parts of Southeast Asia were organized in chiefdoms. Most commonly, the leader in a chiefdom had that power by inheriting in, thus it was running in the family, except if the leader did something really bad so the people replaced him.
The leaders in the chiefdoms were not people from which generosity, gift-giving, or charisma were required. What was needed and required from them was that they are wise, knowledgeable, good military tacticians, good diplomats, to keep their people safe and to bring in prosper in the chiefdom.
