Question

Landholding lords freed serfs from feudal obligations.

People entered into agreements with landholding lords.

Serfs fought to end the rigid class structure.

People ended agreements that tied them to feudal obligations.

Answer 1

Do you want these put in chronological order, checked for accuracy, or grouped by cause/effect?

If you mean chronological sequence describing how feudal obligations declined, a common way to arrange them is:

1. People entered into agreements with landholding lords. (Commutation of labor for money/rent began as the money economy grew.)
2. People ended agreements that tied them to feudal obligations. (Old customary ties were renegotiated or bought out.)
3. Landholding lords freed serfs from feudal obligations. (Some lords formally emancipated serfs to convert land to rent-based farming.)
4. Serfs fought to end the rigid class structure. (Peasant revolts and protests pressured further social change.)

If instead you want a judgment about truth: all four statements describe real developments associated with the decline of feudalism in various places and times, though not every statement applied everywhere or at the same pace.