Fact 1: Mollusks reproduce sexually.

Fact 2: Mollusks are the second-largest invertebrate group.

Given the two facts above, answer the question "the second-largest invertebrate group reproduce how" with the following options: 
- orchids
 - insects
 - with flowers
 - with spores
 - sexually
 - with seeds
 - four limbs
 - ferns


 

     sexually    