The main skills we seek to develop include analysing, interpreting and evaluating ideas.

The main skills sought to be developed by us include analysing, interpreting and evaluating ideas

The main skills sought to developed by us include analysing, interpreting and evaluating ideas

The main skills should be developed by us include analysing, interpreting and evaluating ideas

he main skills sought to be developed include analysing, interpreting and evaluating ideas,

All of the above

Seek is a verb which means get or achieve.

Sought is the second and third form of seek.

Present Indefinite Tense

Active Voice: Subject + Verb + Object

Passive Voice: Object + is/am/are+ third form of a verb + by + subject.