Which of the following soil types would you add to improve the soil texture and drainage for lavender plants that are planted in loam and showing signs of root-rot from damp soil? silt

sand

humus

clay

This is an example of post-zygotic isolation and behavioral isolation. Behavioral isolation is defined as a mechanism allowing members of a species to only identify one another as correct mates. Post-zygotic isolation, however, is when two members of different species mate and create a hybrid, infertile offspring, which is, of course, not desirable and rarely happens without human intervention.