Read the sentence and answer the following question:
our assignment this week directs us to learn about chemical compounds and their properties.
which words should be replaced with something more precise?
learn about
chemical compounds
directs us
their properties

I would contend that the right answer is the 3) "direct us."

Explanation: Just to elaborate a little on the answer, it can be added that an assignment is a specific task given to someone. The verb "direct" sounds vague and imprecise in this context, and particularly very harsh, since it suggests that the students have been given an order, rather than a task that is supposed to be enjoyable and meaningful for their course of studies. I would replace "direct us" for "asks us" or "tasks us with learning."

the most appropriate strategy would be to do a questions and answer type speech.

try