Contacted would be the verb
<u>Answer:</u>
The sequence of key ideas is as follows:
- Travel by land and water were solved in the nineteenth century.
- The twentieth century will solve the problem of flight.
- Wind resistance is a concern that needs to be solved.
- Wilbur and Orville confirm the existence of tangential force.
- Wilbur estimates they will need at least an engine weighing one hundred pounds.
- He estimates the first flying machine will only reach low speeds.
<u>Explanation:</u>
Key idea 1 introduces the main idea of travel and states that land and water travel were taken care of in the nineteenth century, leaving air travel by implication, which is stated in the next idea. It is further elaborated in detail in the third point which explains the aspect of the problem that needed to be solved. The fourth idea introduces Wilbur and Orville and states their findings on the existence of tangential force, elaborating the former's estimates in the fifth and sixth key points.
The phrase "when I was growing up” uses an informal English in the excerpt.
<h3>What is an
informal English?</h3>
This refers to the writing or speech that is marked by a casual, familiar and generally colloquial use of language.
Hence, the phrase "when I was growing up” uses an informal English in the excerpt.
Therefore, the Option D is correct.
Missing options "limited my perception” “her English reflected the quality” “she expressed them imperfectly” “when I was growing up”
Read more about informal English
<em>brainly.com/question/14077232</em>
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