While explaining interspecific interaction of population, $\left(+\right)$ sign is assigned for beneficial interaction, $\left(-\right)$ sign is assigned for detrimental interaction and $\left(0\right)$ for neutral interaction. Which of the following interactions can be assigned $\left(+\right)$ for one species and $\left(-\right)$ for another species involved in the interaction?

• A

  Amensalism
• B

  Commensalism
• C

  Competition
• Correct answer
  D

  Predation

Hence, the correct answer is option: 'D'.