please! help me
First of all, I suggest you to read IELTS band descriptor for writing task 1. You can find it in google and read as much as you can sample answer to gain a pattern which is appropriate in writing task 1.
Here, I wanna share a pattern which is usually used for this task.
1. Introduction; paraphrase the prompt
2. Overview; mention the trend
3. Body paragraph 1; Detail information, you can mention the sameness
4. Body paragraph 2; Detail information, here you can explain the differences.
If you have read the band descriptor foe writing task 1, there is no conclusion. However, Overview is must be written. Other attention must be paid in language of change and language of contrast. If you get a chart which has a time duration you should use language of change (a significant decline) and language of contrast (the largest proportion of population is ...)
this figure was significantly decreased until 1980.
was a significant decrease