Answer:
Both Change A and B
Explanation:
Given that chemical changes is a form of change of matters that deal with the combination of various substances to form a new substance entirely that has different chemical and physical characteristics from its parents' substances.
Hence, when Animal waste is acted upon by anaerobic bacteria to produce biogas it is considered a chemical change.
Similarly, when biogas burnt as fuel it is also considered as a chemical change.
Therefore, in this case, the correct answer is "Both Change A and B" are chemical changes.
Drive reduction approach to motivation, this theory states that when an individual has been deprived of biological resources such as energy, water or sleep, others. They tend to result to impulse or drive. These basic needs arise an action to obtain this need is required.
Answer:
A. sexual reproduction
Explanation:
Sexual reproduction produces a new combination of genes in the offspring that may better enable them to survive changes in the environment and assist in the survival of the species.
Coal. -from my dad lol ill check
If you are talking about Alfred Wegener, then his Hypothesis was Continental Drift, a Theory that suggested that all the continents were once one large supercontinent, named Pangaea, But drifted apart from each other over a long period of time.
