Given a scientific passage and an answer, generate a question for the given answer.

Example Input: Passage: The heat that is either absorbed or released is measured in joules. The mass is measured in grams. The change in temperature is given by , where is the final temperature and is the initial temperature. Answer: joules
Example Output: In what unit is heat measured in?

Example Input: Passage: Connective tissue consists of cells that form the body's structure. Examples include bone and cartilage, which protect and support the body. Blood is also a connective tissue. It circulates and connects cells throughout the body. Answer: connective
Example Output: What tissue consists of cells that form the body's structure?

Example Input: Passage: For individuals to cooperate, they need to communicate . Animals can communicate with sounds, chemicals, or visual cues. For example, to communicate with sounds, birds sing and frogs croak. Both may be communicating that they are good mates. Ants communicate with chemicals called pheromones . For example, they use the chemicals to mark trails to food sources so other ants can find them. Male dogs use pheromones in urine to mark their territory. They are "telling" other dogs to stay out of their yard. You can see several examples of visual communication in Figure below . Answer: communication
Example Output:
Sounds, chemicals, and visual cues are examples of what between animals?