Commercial diverse
double
estimate
quantity
survive
reduce
restore
species
stable
Many human activities affect the health of global oceans. These many various activities are
(1)
but include fishing, manufacturing, and oil production. Pollution has increased
and in some areas we have even seen it (2)
in recent years. The amount, or
(3)
of oxygen in the water is less because there is more pollution and carbon dioxide.
Large ships such as oil tankers and (4)
fishing boats pollute rivers that empty into the
sea. Warmer water temperatures harm some fish (5)
Scientists say that some fish will
not (6)
if we don't make changes. Environmentalists (7)
that we
only have 30 years before it's too late. We must (8)
pollution and over fishing as soon
as we can to make a difference.

d bc i just guessed

to eliminate ambiguous remote or broad reference it is necessary to focus on anaphoric reference. by definition "anaphoric reference means that a word in a text refers back to other ideas in the text for its meaning." the references should be clear and leave no room for ambiguity.

in the first case the pronoun it probably refers to the car but it has not been mentioned before so we should replace it for the car. in doing so the statement becomes clear.

in sentence number   two   the pronoun he refers to charles dickens the author. yet, the first half of the sentence is about the book a tale of two cities. to repair this it would be better to rephrase the first half : after i read   a tale of two cities by dickens, he so as to remove the remote reference.

a. by showing how a character reacts to or interacts with his or her   surroundings

explanation:

the setting reveal information about a character by showing how a character reacts to or interacts with his or her   surroundings.