Construction is the process of constructing a building or infrastructure. Construction differs from manufacturing in that manufacturing typically involves mass production of similar items without a designated purchaser, while construction typically takes place on location for a known client.
Eutherians, often called placental mammals, have a unique reproductive system in which unborn young are nourished for an extended period via a placenta. This system permits retention of the young in the protective environment of the uterus during most of early development.
The official definition for the word mammal is a warm-blooded  vertebrate animal of a class that is distinguished by the  possession of hair or fur, the secretion of milk by females for the  nourishment of the young, and the birth of live young.. Mammals are warm blooded. They also have hair or fur.