A metamorphic rock is a type of rock which has been changed by extreme heat and pressure. so must be option D
<span>several types of : Bacteria are used to produceed yogurt
There are some type of Bacterias that are actually good for out digestive system. In order to make yogurt, the most common type of bacteria that being used are Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus bacteria</span>
The answer is B between respiration and combustion
