All possible but 1, 2, 3 better than 4.
Sra
1. Say your thoughts about the following.
2. Say your ideas about the following.
3. Say something about the following pictures in your own words.
4. Speak your own ideas about the following.
(Are they grammatical? Which ones are right?)
2 answers
You can also use "Tell us" or "Tell me" instead of "Say" or "Speak."