The answer is an abdominal cavity.
The abdominal cavity refers to a space that comprises various essential organs including the stomach, the lower part of the esophagus, colon, small intestine, gallbladder, liver, rectum, bladder, spleen, and kidneys.
The abdominal cavity is a big cavity found in humans and various other animals. It is a component of abdominopelvic cavity. It is situated above the pelvic cavity and below the thoracic cavity. Its dome-shaped roof is the thoracic diaphragm, a thin sheet of muscles beneath the lungs, and its floor is the pelvic inlet, opening into the pelvis.
Symbiosis
a bird that sits in the mouths of crocodiles eat left over food from the crocs mouth while the crocodile gets his teeth clean
Basic cooperation
a colony of army ants are able to work together to take down bugs 10x its size by over wellming the bug because they cooperate and work together as a team. using cooperation
California is very well known for fires so in this case I'd say go with the answer of "<span>SEROTINOUS CONES" which are special "seeds" to easier put it that only spread with the aid of fire. These cones are spread by fire/wind/gravity as time goes by the trees will grow back as a result.
Another well said answer can be secondary succession. Secondary succession "</span>reduces an already established ecosystem <span>to a smaller population of species" or series of changes that take place after disasters on forests/general like fires.</span>
