<u>Answer:</u>
The lines "State your argument concisely in the thesis statement." and "Connect ideas using transitional words and phrases" are the two instructions that are required to write a strong essay.
<u>Explanation:</u>
As a strong essay must have good, valid, clear and concise arguments to express your view on the topic.
And having a well connected essay with well connected ideas by using transitional words and phrases keeps the interest of the reader alive and doesn't confuse the reader about your purpose and expression on the topic of the essay.