specialize

Evolve so as to lead to a new species or develop in a way most suited to the environment.

Become more focused on an area of activity or field of study.

“She specializes in Near Eastern history”

Be specific about.

Devote oneself to a special area of work.

“She specializes in honey bees”

“This baker specializes in French bread”

Suit to a special purpose.

“specialize one's research”

“this kind of beak has become specialized in certain Galapagos finches”