caving

"The exploration of new hiking trails is a favorite family activity. "

"My brother uses the underground to get to work every day. "

"The park offers many recreational activities, such as walking paths and a playground. "

"The quality and scarcity ensured that the product was eminently marketable."

"The dog is exploring the backyard for his lost ball. "

"She suffered a terrible collapse after slipping on the wet floor."

"Apply pressure to the wound to stop the bleeding."

"The secret passage undermined the foundation of the old house, making it unstable. "

"The old building's roof collapsed during the storm, sending debris everywhere. "

"The storm severely damaged the school's roof. "

"Railway crossings without gates are highly dangerous."

"The tired student saw the enormous pile of homework and felt a wave of surrender. "