Final answer:
Frankie's fall while skateboarding could injure both muscle and epithelial tissues in the abdominal region, as well as potentially affect connective and nervous tissues.
Step-by-step explanation:
When Frankie was skateboarding, he fell and injured his abdominal region. In such a scenario, the types of tissues that could have been injured include muscle and epithelial tissues (Option B). The abdominal region is primarily composed of muscle tissue, which allows for movement and support, and epithelial tissue, which lines the organs and cavities within the region. Additionally, connective tissue in the area, which binds organs together and supports the body's structure, could also be affected by his fall.
Nervous tissue may be involved as well if the fall resulted in damage to nerve cells in the area responsible for sensation and control of the abdominal muscles. Nevertheless, the most directly affected tissues would most likely be muscle and epithelial tissues due to their prevalence and exposure in that region.