Biennial means..
Taking place every other year.
The qualities of effective summaries of informational texts is that it includes main idea and supporting details and should be written in complete sentences.
Given are four options out which two are the qualities of effective summaries of informational texts.
Effective summaries of informational texts refer to the summary of an article, essay or a blog which explains the idea of the text in brief.
It uses complete and correct language. The summary includes the main idea of the text. It is then followed by the supporting details in brief.
The summary does not include any personal opinions and beliefs because it is a formal piece of writing. The language used is formal and no quotations are used.
Hence the correct options are (1) and (2).
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