Which line from the excerpt is an example of objective language? In the course of the construction of the Bridge a number of lives have been lost. Does it not sometimes seem as though every work of enduring value . . . must needs be purchased at the cost of human life? Let us recall with kindness at this hour the work of those who labored here faithfully unto the death . . . Let us give our meed of praise to-day to the humblest workman who has here done his duty well . .

The line that contains objective language are the following:

What is objective language?

It is the use of words and expressions that do not provide information that is connected with personal opinions or feelings. Being objective means being able to provide factual information without involving your personal opinions or feelings towards the subject being discussed. Grammatical structures such as passive voice and inversion are used in  order to provide objective information, because these structures avoid mentioning the subject or the emphasis is placed on the situation and not on the subject.

The line "In the course of the construction of the Bridge a number of lives have been lost." is an example of passive voice, by using this structure the subject is omitted, and there is factual information being provided without the involvement of any kind of opinions or feelings towards the subject matter.

The line from the excerpt that is an example of objective language is "In the course of the construction of the Bridge a number of lives have been lost."

Explanation:

Taking in consideration that objective language is to talk about something unbiased and without showing any kind of opinion or point of view, in a direct clear and countable way, the sentence "In the course of the construction of the Bridge a number of lives have been lost." is talking about countable facts towards the death of many in the process.

type of error:

the error in the sentence is a "dangling modifier". a dangling modifier is a phrase, word or clause that "dangles" because there is not target to modify. in this case, "after mopping the floor" is the dangling modifier since it has no word to modify. the noun "house" cannot mop the floor; therefore there is a mistake in the writing of the sentence.