The graph below shows the number of enquiries to tourist information office made by telephone, letter/email, and in person from January 2001 to June 2001. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The given line graph illustrates the number of inquiries made to the Tourist Information Office through various means of communication, between January and June 2001. It is evident that the enquiries made in person and by telephone showed an upward trend, whereas those made by email and letter showed a downward trend. As can be seen from the graph, there are three channels through which inquiries were made, namely – in person, by telephone, or by email or letter. Interestingly, the number of inquiries made in person increased continually over the period from 400 enquiries in January to 1200 enquiries in June. Telephone enquiries started at 800 in January and stabilized at this number till April, after which telephone enquiries increased and reached 1100 by June. The e-mail or letter enquiries stood at approximately 600 in January and remained at almost the same level till March, but after that decreased moderately and touched an all-time low of 200 by June. Overall, it is lucid that in-person inquiries became the most popular within the given period of 5 months.