In 1–2 sentences, explain which word or phrase should be added to the paragraph to increase its cohesion and why that word or phrase would increase cohesion.

High schools should require all students to take four years of math. Even though most students will probably not become mathematicians, many of them will choose a profession where math plays an important role. Architects, pharmacists, and carpenters all use math every day. A strong math foundation in high school is important for students to succeed in these and in other professions.

Therefore, high school students should be required to take four years of math in order to prepare them for future careers and ensure their success in various professions. Adding the word "therefore" at the beginning of the sentence would increase cohesion by clearly indicating that the following statement is a logical conclusion based on the information provided in the previous sentences.