You didn't give the options for techniques, but I will explain to you what rhythm in a poem is.
Simply put, rhythm can be defined as the beat and velocity of a poem. Rhythm is created by a continuous pattern of 'stressed and unstressed' syllables in a line or verse of your poem. Rhythm can help to strengthen the application of words and ideas in a poem.
 
        
             
        
        
        
<span>The lysosome inside a cell would probably split given the correct conditions. The likelihood of a cell with a lysosome inside actually splitting can vary depending upon what type of cell it is. There is a possibility that the cell would tear instead of split, but that seems less likely than a split occurring.</span>
        
             
        
        
        
You did not include options in your question, but based on the meaning of the word cryptic, your answer will be 'A HIDDEN MEANING'.
When you say that something is cryptic, it means that, that thing has a meaning that is mysterious or obscure.
From the way the word was used in the given sentence, it means that the message the teacher was passing across about the test is hidden, it was not understood by any of the students.
        
                    
             
        
        
        
<span>When an activist decides to use a song, speech, or video to communicate his message, he is using strategic support to reach his audience. An activist is someone who passionately believes in a cause.</span>