Final answer:
Carpal tunnel syndrome is primarily caused by repetitive wrist movements leading to the compression of the median nerve. Of the options given, only texting and typing are likely causes, as they involve such repetitive motions.
Step-by-step explanation:
Carpal tunnel syndrome can be caused by repetitive use of the wrist that results in the compression of the median nerve. Among the options provided, texting and typing on a keyboard can lead to such repetitive stress. Carpal tunnel is the passageway in the wrist through which the median nerve and several tendons run. Conditions that involve repetitive hand motions, especially those that involve prolonged wrist flexion or extension, can contribute to the development of carpal tunnel syndrome.
Skateboarding and running too long are activities that are unlikely to cause carpal tunnel syndrome as they do not typically involve repetitive movements that stress the wrist in a way that would compress the median nerve.