Explain scientifically whether humans and humpback whales share a close evolutionary relationship. Here are some ideas to consider as you structure your response: Do they have any body structure similarities that suggest an evolutionary link?
How do scientists classify each organism? What is their kingdom, phylum, class order, and so on? Does this tell you anything about their evolutionary lineage?
Does their embryology hold any clue to their evolutionary relationship?

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its temperature is increasing. this causes molecular vibrations to increase.

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.

estuaries are the partially enclosed coastal bodies of brackish water formed at the mouth of sea where river meets an ocean. it is a transition zone between river and sea water so estuaries are influenced to both marine environment such as tides, waves and to riverine such as flow of fresh water and sediments. the mixing of sea and fresh water provide high level of nutrients, making estuaries a high product habitats.

many estuaries suffers degradation from a variety of human activities like erosion from deforestation, overgrazing, overfishing, drainage and eutrophication.

so from the above statement answers will be

1. false as estuaries are formed due to both brackish and freshwater.

2.true, due to high productivity estuaries are breeding ground for many marine species.

3. direct and indirect activities of man that contribute to pollution and deposition of sediments.