SO/ BECAUSE (OF) TO SHOW CAUSE AND EFFECT

https://www.engblocks.com/grammar/exercises/and-so-but-because/so-vs-because-exercise-2/

https://www.englishgrammar.org/the-conjunctions-because-and-so/

https://www.esl-lounge.com/student/grammar/2g44-so-because.php

https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-98728.php

https://www.learnenglishfeelgood.com/esl-conjunctions-because-so1.html

https://www.esl-lounge.com/student/grammar/2g76-pre-intermediate-so-because-reordering.php