Today, with the introduction of information technology, life becomes more complex.
Here you use a time expression – today – in order to provide your reader with time context, or a time frame. Unfortunately your verb and your time expression do not match.
Today can mean literally ‘today’, so if today is Thursday then today means Thursday. But today can also mean other things. In academic papers today often refers more generally to time around now.
Time around now began at some point in the past and is likely to continue until some point in the future. Exactly how far into the past and how far into the future does time around now extend? Well that depends on the topic. Since ‘information technology’ implies quite recent innovations, then we’re probably thinking – in this example – of a roughly twenty year period with ‘now’ somewhere in the middle.
Time around now can also refer to a recently new, more permanent condition, that may not be likely to change, at least not for a long time.
Depending on which verb tense we choose, we can communicate either new, permanent condition OR continuous action.
Since information technology is changing continuously – i.e. becoming more complex all the time – then we need present continuous tense.
‘Become’ always implies a change, unlike the Indonesian ‘menjadi’, which can communicate a permanent state: “Siti bilang bahwa rumahtangganya tidak bahagia, karena suami tak pernah memberikan nafkah batin yang menjadi haknya.”
If we want to describe a more permanent state in English, then present simple tense is used:
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