The third step in the cycle is the tolerance of negative consequences. examples of these are physical damage, legal trouble, financial problems, academic failure, and family dissolution. 9. the fourth and last step is denial or the inability to perceive that a certain behavior is self-destructive.?

Yes, the fourth and last step is denial or the inability to perceive that a certain behavior is self-destructive.

Explanation:

The most important aspect of addiction of harmful elements is the psychological dependence of our body.To achieve the developed tolerance, the person needs more consumption of that drug hence getting more into the physical damage and family dissolution. After tolerating the negative consequences the person reaches the final step where he or she denies to understand any negative effect of that self destructive element and continues its consumption.

Covalent bond is the correct answer