Final answer:
The object created during the formation of a star is a protostar, a very young star undergoing the process that leads to nuclear fusion in its core.
Step-by-step explanation:
During the formation of a star, the object that is created is a protostar. A protostar is a very young star that is still in the process of formation. It is the stage following the formation of dense cores within a clump of gas and dust and occurs before nuclear fusion begins in the core of the star. The process starts with a dense core collapsing under its own gravity and contracting, leading to an increase in temperature and density until conditions are hot and dense enough to start nuclear fusion, ultimately giving birth to a new star.