Which statement is correct?

A. Synapomorphies identify monophyletic clades.
B. A synapomorphy is an ancestral trait shared with an outgroup.
C. A synapomorphy may arise due to convergent evolution.
D. Synapomorphies are examples of homoplasy.

A. Synapomorphies identify monophyletic clades.

Explanation:

Synapomorphy is a shared trait or character derived during evolution, that is commonly found between two or more taxonomic groups or descendants of the same ancestor. Synapomorphy differentiates a clade or monophyletic group from other organisms.

Synapomorphy helps with provide evidences common to an ancestry and also helps to identify clades and monophyletic groupings, such as the ancestral relationships highlighted in a cladogram.

An example of a Synapomorphy is the skeleton in gorilla and humans.

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.