How do you translate the word outreach to french?

The infinitive of the verb for "can", or "to be able to", in French is "pouvoir".

Somber could simply be translated as sombre ("soh[n]br"), which literally means dark but by extension can also mean solemn, somber, etc.

Photographies, photos, clichés are all synonyms.

intéressant(e)

It depends on some of what. ;-) It could be du, de la, des or quelques. You will probably get a more helpful answer if you ask for a translation of the whole phrase.