Thermotoga maritima is a bacterium that can survive extremely high temperatures. Some of its genes most resemble those of archaea that live in similar extreme environments. This is most likely the result of endosymbiosis. lateral gene transfer. conjugation. convergent evolution. common ancestry.

Thermotoga maritima is a bacterium that have similar genes of most of the archaea that live in similar extreme environment is most likely the result of lateral gene transfer.

Explanation:

This bacteria contain certain genes that are extremely similar with the genes that are present in archaea. This is a example of lateral gene transfer where  acquisition of  genetic material takes place by another organism without being it's offspring.

Prokaryotes can exchange genes under highly selective condition through lateral gene transfer that enters in to the body of diverse bacteria where the genes involve in several functions like metabolic function, transport of energy transcription, gene regulation etc.

b is the best answer for this question.