Question

When do people prefer to send an email rather than send a text

Answer 1

Answer:

A text message sent by mobile phone is much quicker to send and receive than an e-mail; it happens in real time. For very urgent or important communications, texting can be useful, especially for business professionals who are out of the office or traveling.

Explanation:

Answer 2

When something is urgent, or you have a short message you want to deliver quickly, text messages are probably the most popular, aside from phone calls.
E-mails are more for long messages, i.e. job applications, business inquiries etc.

Given that people tend to pay attention to text messages more than e-mails, since the text message system is more based on private conversations, whereas your e-mail gets flooded with spam advertisements.