The "hearths of urbanization" refer to the regions where cities and urban life first independently developed. Traditionally, several primary hearths (often five or six) are recognized by archaeologists and historians, where early complex societies and urban centers emerged.
The commonly identified primary hearths of urbanization include:
\begin{enumerate}
(ª) Mesopotamia: Centered around the Tigris and Euphrates rivers (modern Iraq), with cities like Ur, Uruk, Babylon emerging from around 3500 BCE.
(«) Nile River Valley (Egypt): With cities like Memphis and Thebes, developing from around 3100 BCE.
(¬) Indus Valley Civilization: Along the Indus River and its tributaries (modern Pakistan and Northwest India), with cities like Harappa and Mohenjo-Daro, from around 2600 BCE. (Option c)
() Huang He (Yellow River) and Wei River Valleys (China): Early urban centers in China, such as Erlitou and Anyang, developing from around 2000-1500 BCE. (Option d)
(®) Mesoamerica: Regions in modern Mexico and Central America, with Olmec, Maya, Teotihuacan, and Aztec urban traditions developing independently from around 1200 BCE onwards.
(¯) Andean Region (Peru): Coastal and highland Peru, with sites like Caral-Supe (Norte Chico civilization) showing early urban characteristics from around 2600 BCE, and later cultures like Moche, Chimu, Inca.
Sometimes the number is cited as five, often combining Mesoamerica and Andean or focusing on Old World hearths. If five are listed, they are typically Mesopotamia, Nile Valley, Indus Valley, Huang He Valley, and Mesoamerica.
Let's evaluate the options:
(°) (a) Etruscan Civilization: The Etruscans flourished in ancient Italy (Tuscany region) from about 8th century BCE to 1st century BCE before being absorbed by Rome. They had well-developed city-states (e.g., Tarquinia, Veii, Caere). While they were urbanized, the Etruscan civilization is generally considered a secondary development, influenced by Greek and Phoenician contacts, rather than one of the primary, independent hearths of initial urbanization that occurred much earlier in other parts of the world.
(±) (b) Mesopotamia: One of the earliest and most influential hearths of urbanization.
(²) (c) Indus Valley Civilization: A major primary hearth of urbanization.
(³) (d) Huang He and Wei river Valley (China): A primary hearth of urbanization in East Asia.
Therefore, the Etruscan Civilization is not typically considered one of the primary "five hearths" where urbanization first independently arose on a large scale. It emerged later and in a context of existing urban traditions in the Mediterranean.
\[ \boxed{\text{Etruscan Civilization}} \]