Which of the following is an example of criminal trespass?

Criminal trespass is defined under Texas law as entering or remaining on a property without consent when it is known that the entry was not authorized. In this context, staying on private property after being asked to leave clearly exemplifies criminal trespass, as it involves remaining on the premises against the owner's wishes after their direction to vacate. This action disregards the property rights of the owner and constitutes a violation of the law.

Other scenarios presented do not meet the criteria for criminal trespass. Walking through a public park is generally acceptable as parks are public spaces open to everyone. Entering a public building during operating hours, like a library or city hall, is also lawful since these buildings are designed for public access. Finally, visiting a friend’s house with permission is part of normal social conduct and is not considered trespassing because consent has been granted by the property owner. Thus, the only option that clearly fits the definition of criminal trespass is the one regarding remaining on private property after being asked to leave.