A. The results of the experiment showed a quantifiable decrease in oxygen levels.
Explanation:
The chosen sentence possesses a formal register with technical vocabulary related to science, which can be understood by professional scientists. For instance, the words <em>quantifiable </em>and <em>decrease </em>have a more academic style. Besides, the writing is impersonal and written in the third person.
The rest of the options are incorrect because they have contractions and they are too informal. Thus, their vocabulary contain casual expressions which do not follow the conventions of an academic style.
You can use gestures to emphasize key points. Volume and tone both include verbal so it isn't those, and then pace is how fast you move which usually doesn't affect key points.
Explanation: Sit down with your child and explain to them how difficult things are with no help. That everyone has chores, need to help around the house, & how it’s respectful and shows that they appreciate you.
