Turning to the bar chart depicts the percentage of trend in tourism in Harbour City Tourism over a 30-year period.
You should make your intro clear,most importantly understand what a chart present,there are many variations of charts but each has similar purposes
If there is any differences in time so you can use "illustrate changes" like: "the chart illustrates change in"
Otherwise it can use "compare" like: "chart compares countries in"
I do not recommend to use any weird vocabulary in task 1 such as "depict"
Next point is you should find main verbs for this chart.
For instance in this chart it is "prefer to travel by" or "choose a hotel",
the percentage of accommodation had increased
In addition,what does this sentence mean? It is not the percentage of accommodation increases, it is a figure increases.
the number of passenger preferred to travel by train than by air in 1970
The number of passengers increases or what?
do not use this sort of vocab as it inappropriate for this task.
There is no interesting things in this chart.
However, air travel more popular
air travel was more popular