What are the concrete and abstract nouns in this sentence.

the girl showed courage when she saved her brother from the volcano.

Concrete noun is a noun that we can hear, see, smell, touch, and taste, so it is interacted in a physical way through our senses. For example, house, tree, bottle…

On the other hand, abstract noun exists only in our mind; it cannot be touched, seen, or tasted. Abstract nouns refers to feelings, emotions, qualities, concerns…  For example, love, freedom…

In this sentence, girl, brother, volcano are concrete nouns, but courage is an abstract noun.  

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.

can you take a picture of the passage so i can answer your question