Hello,

See it's entirely your decision when it comes to changing your career however you should introspect as in why do you want to switch your career, and what are the career goals you're aiming at, you can easily pursue your msc in zoology, followed it by qualifying for CSIR NET, and you can become lecturer, if you qualify JRF then you can also pursue higher studies such as PhD, other than this you can try for PGT in top government schools for which BEd is compulsory,

now coming to your question, there are various subjects in which you can do MA such as English which is a language well known, spoken all over the world, so this is an added advantage here, Economics too hold good scope and you can also appear for various government exams especially for this field, there are international relations, journalism and mass communication, linguistics, geography, sociology, anthropology, psychology or even foreign language too has good scope, however if you wish to pursue master's then proficiency in the language is essential, so you may have to gain that through certification courses, explore more detailed information about MA at https://www.careers360.com/courses/m-a-master-of-arts