In the second half of the 19th century humans used all of the following technological advances to modify and adapt to the physical environment EXCEPT?

In the second half of the 19th century, humans utilized various technological advances such as the steam engine, telegraph, and advancements in agriculture to modify and adapt to their physical environment. However, they did not use advanced digital technologies, such as computers or the internet, which did not emerge until the late 20th century. Thus, digital communication and technology were not part of the adaptations made during this period.