Answer:
In 1786, the French chemist Antoine Lavoisier coined a term for the element oxygen (oxygène in French). He used Greek words for the coinage: oxy- means “sharp,” and -gen means “producing.” Oxygen was called the “sharp-producing” element because it was thought to be essential for making acids.
Explanation:
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Here is a structure on how to answer:
1. Think of two examples: Maybe you think that developing countries does not have as much art - which does contribute to the happiness of the people.
Second, maybe the living conditions.
2. Research to add credibility.
A set of three hierarchical models used to classify educational learning objectives into levels of complexity and specificity
You are right. the answer is D
The past perfect refers to a time earlier than before now. It is used to make it clear that one event happened before another in the past. It does not matter which event is mentioned first - the tense makes it clear which one happened first.
