What contrasting imagery does Trumbull use to describe his vision for the future of the nations?

yes, it can be both.

the present continuous is a verb tense which is mainly used to indicates that an action is in progress at the moment of speaking.  

it is formed using: person + verb to be (am/is/are) +verb + - ing form  

example: i am studying at this moment .

in addition, the present continuous is also used in order to express things that will or will not happen in the near future.

example: i am having dinner with some friends tonight.

the speaker sometimes   uses it   to express that an action is repeated and it causes irritation on the part of the speaker

example: my sister is constantly complaining about everything.

abater   ambary   ambery   baryta   baryte   bemata   betray   jarvey   ramate   ramjet

explanation:

those are all the possible words

most likely you should find things like facts and important information to you understand. i hope this .