Select all the statements from the "summary checking guidelines" that are true of the summary below.

For many years, scientists have tried to understand how the weak-eyed bats can travel without hitting objects. After years of experimentation, they discovered that though the bat can fly safely without sight, it needs both its mouth and its ears. Scientists found that bats send out a high pitched noise which bounces off objects and re-enters their sensitive ears. This built-in radar system enables bats to judge distances without sight.

The topic sentence includes the main idea.
The summary is clear and concise.
The summary is about one-third the length of the original.
It expresses the author's ideas and is not a private interpretation.

the federalist party which advocated strong centralization dominated the united states government till 1800. so 1800 election transformed the power from one party to another party for the first time and was thus a turning point in american history. so jefferson called it "revolution of 1800".

explanation:

how did justinian contribute to the byzantine empire?

one famous byzantine emperor was justinian i. justinian ruled from ad 527 to 565. belisarius was the commander who led these armies in an attempt to win back the old western roman empire. the war effort to take back the western part of the empire forced justinian to raise taxes on the people of the byzantine empire.

explanation:

mark brainliest and have a great day!

the indians crossed artificial boundaries, setting the stage for conflict

"a government in which power is divided between state and national levels". federalism is a system of government in which entities such and state and province, share power with the national government.