it could be a mangintic force.. Because if two magnets a.k.a the north and south pole magnets are brought together they will push each other away instead of sticking.
Hope this helps
an unbalanced force
Explanation: because the forces are uneven one is stronger
The correct answer is letter "B": fixed-interval.
American psychologist and social philosopher B.F. Skinner (1904-1990) is the father of Operant Conditioning Theory which proposes it is needless to analyze thoughts to explain individuals' behaviors. In such a way, Skinner believed human beings react based on a series of rewards and punishments influenced by reinforcements.
Skinner schemed five (5) schedules to relate the nature of those reinforcements: continuos, fixed-interval, variable interval, fixed ratio, variable ratio. In the fixed-interval rewards are given at fixed rates. This causes average and irregular performance with rapid extinction. Thus, a payment plan that does not vary based on performance is an example of the fixed-interval reinforcement schedule.