What is the main strategy with which authors of informational texts develop central ideas in their texts? restate the idea in a conclusion that sums up the main points of the text. support the idea with relevant details that are logically connected. attract the reader's interest in the idea in the first sentence or two. leave the idea unstated but implied, so that the reader infers it.

its d! the final exam asked good luck

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.

it provides a unique and personal perspective on a significant historical event.