Critical Thinking is having the ability to think clearly and rationally, and when understanding the logical connection between ideas. And when should care because it has the ability to engage in reflective and independent thinking. Hope this helps :)
The two protagonists are there to support each other and help each one succeed. Grant's story unfolds with Jefferson. The community involved in their path towards their destination is the black community and the Reverend. Grant was guided towards reconciling his insecurities regarding his race and also reconnecting to his roots, making this the first step towards his success.