Pls help me on this i cant find the answer

What is the meaning of the word checking as it is used in this sentence from the second paragraph of the passage?

Which words in this excerpt from the count of monte cristo can be used as synonyms to determine the meaning of the word grotto? dant? s entered the second grotto. the second grotto was lower and more gloomy than the first; the air that could only enter by the newly formed opening had the mephitic smell dant? s was surprised not to find in the outer cavern. he waited in order to allow pure air to displace the foul atmosphere, and then went on. 1. air 2. opening 3. mephitic 4. cavern 5. pure 6. atmosphere

Which if the following does the communist party do through it's party organization? select all that apply. ensures freedom of the people recruits members and leaders develops policy indoctrinates the people maintains discipline