They are thermoacidophiles.
a. archaea
b. bacteria
c. both archaea and bacteria

A) Archaea

Explanation:

Thermoacidophiles are the extremophilic micro organism which comes under the condition of high temperature and the low PH value. Bacteria is the process which consist of single celled with lack of the nuclei and it is the membrane bound organelle that is why, bacteria do not included in the thermoacidophiles but it comes under in the archaea domain.

there are mainly three domains in biological classification namely; archaea, bacteria, and eukarya.

archaea includes all the prokaryotic cells which are characterized by their lipid membranes. they have branched hydrocarbon which is attached to glycerol through an ether linkage.

bacteria includes all the prokaryotic cells, the cell membrane of which are made up of the unbranched fatty acid chain. in addition, they are attached to glycerol through an ester bond.

eukarya includes all the eukaryotic cells, that is, the cells contain a nucleus and other membrane-bound cell organelles.

they can be autotrophic as well as heterotrophic, unicellular as well as multicellular

they include kingdoms like protista, plantae, animalia, fungi et cetera.

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explanation:

the correct answer in apex is tissue development, i know because i just had this question