In cognitive-behavioural treatment of depression, behavioural activation tasks could includeGroup of answer choicesmaking a special meal.relaxing on the couch.disputing dysfunctional beliefs.reflecting on life goals.

In the cognitive-behavioral treatment of depression, behavioral activation tasks are designed to help patients engage in activities that they used to enjoy or find rewarding, but have stopped doing due to their depression. These tasks are meant to help patients break the cycle of avoidance, inactivity, and low mood.

So, among the options provided, making a special meal could be considered a behavioral activation task. This activity could help the patient experience pleasure, accomplishment, and engagement, which are all positive experiences that can counteract the feelings of sadness and hopelessness that characterize depression.

Relaxing on the couch, while it might be enjoyable, is not typically considered a behavioral activation task because it is a passive activity that does not require much engagement or effort.

Disputing dysfunctional beliefs is a cognitive strategy used in cognitive-behavioral therapy, but it is not a behavioral activation task. This strategy involves identifying and challenging negative thought patterns that contribute to feelings of depression.

Reflecting on life goals could be part of cognitive-behavioral therapy, especially if it leads to the identification of specific, achievable goals that the patient can work towards. However, this is more of a cognitive task than a behavioral activation task.

In conclusion, the correct answer is "making a special meal".