Question

1. Describe what Sonya does at the dacha.
2. What does Sonya do at the dacha?
3. Write down what Sonya does at the dacha.
4. Write more than 7 sentences, describing the things that Sonya does at the dacha.
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Which ones are suitable for a title?

Answer 1

1. Describe what Sonya does at the dacha.
2. What does Sonya do at the dacha?
3. Write down what Sonya does at the dacha.
4. Write more than 7 sentences, describing the things that Sonya does at the dacha.
5. Write down more than 7 sentences about Sonya based on the reading text.
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Which ones are suitable for a title?
What about #5?

Answer 2

"Write down" is redundant. I assume it means to write on paper, but that's what writing is, putting some ideas in a form that others can read (as opposed to writing in air, I suppose).

What kind of "title" are you trying to write? The title of a book or article or movie, etc.? If this is a class assignment, it's not a title.

Any of these is quite proper, depending on exactly what you want the student to do. The only quarrel I have is that any number under 11 is spelled out, not written in numerals (seven, not 7).