The correct answer is (D) The quality or state of being fecund (prolific, fertile). 2. Reproductive capacity, especially of female animal; ability to produce young in great numbers. 3. Fruitfulness; fertility. the capacity of abundant production (fecundity of imagination).

Examples of use:

• There have been numerous studies of the fecundity of these forms of life.
  
  
• Mice are known for their high fecundity.