All mosquitoes do not lay their eggs in a...

The answer indicates that all mosquitoes do not lay their eggs in a raft-like formation. In reality, while some species of mosquitoes, particularly those in the genus Aedes, often lay their eggs in a raft-like formation or clusters on the water surface, many other species have different laying behaviors.

For example, Culex mosquitoes tend to lay their eggs in a more dispersed manner rather than in rafts. Additionally, some species prefer laying their eggs in single layers or in a more scattered pattern away from water sources. Therefore, the statement that all mosquitoes do not lay their eggs in a raft-like formation emphasizes the diversity in oviposition strategies among various mosquito species, making the choice accurate in that context.