B- yeast is used for baking things, it helps the dough rise in bread and pizzas etc
The answer is A: They produce pollutants that harm people.
Hope this helps
I think that the best answer is first one:
a) Trace the path that the sound waves travel as they enter the ear and proceed to the receptor cells for hearing, making sure to explain the process of transduction.
Dehydration synthesis<span> is the process of joining two molecules, or compounds, together following the removal of water. When you see the word </span>dehydration<span>, the first thing that may come to mind is 'losing water' or 'lacking water.' ... </span>Dehydration synthesis<span> is classified as a type of chemical reaction.</span>
