When reading ivanhoe, it is to know this fact because it explains
a. why many of the knights show indifference.
b. why lady rowena is the queen of the day.
c. why there is tension between the two sides in the tournament.
d. why the people of the tournament defer to prince john.

C). Why there is tension between the two sides in the tournament.

Explanation:

While reading Ivanhoe, it is significant to have a fair idea of the given historical fact as it elaborates 'why there is tension between two sides in the tournament' as the tournament is a reflection of the deep-rooted conflict between the Saxons and the Normans which would assist the readers to know the context of the adventure story that would aid them to understand the text more comprehensively.

Each adventure in the text either directly or indirectly associated with this ingrained tension between the Saxons and the Normans. The text also attempts to provide possible resolutions to end this tension. Since the entire text is surrounded by this tension or conflict it becomes quite beneficial to know the reason behind the tensions on two sides while reading 'Ivanhoe'. Therefore, option C is the correct answer.

the turtle carries new life, oat seeds, over to the other side of the highway and plants them there.

a is the indefinite article