Facial expressions, such as snarling or grimacing, play a crucial role in lion communication by conveying various emotions and intentions. For example, a lion may snarl to show aggression and establish dominance within the pride or towards competitors. Grimacing can signal submission or discomfort, helping to maintain social order among pride members. These expressions can also indicate warning signals to potential threats or communicate readiness to defend territory. Overall, facial expressions are essential in facilitating effective communication and social interactions among lions.