As an active listener, which of these activities should Gael's classmate be doing in this scenario?
Gael is showing his classmate how to build a rubber-
band catapult for their history project. They are
standing at a table with the materials organized in front
of them. Gael first describes the goal of the project and
the materials they will be using. Then he begins his
explanation of how to make the catapult.
asking Gael questions to check his understanding
o deciding how he will evaluate the success of the
project
building the catapult as Gael describes the materials
they are using
using terms that are appropriate to his audience

c. explains words’ origins and variations.

because it's a cool name

explanation:

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.

explanation:

it refers to the definition of full-contact sports, where the condition is that the sport must have athletes must "purposely collide with each other