session, cession

Session or session means a series of meetings or group functions--
The current session of congress began in January.
The musicians stayed on after hours for a jam session.

Cession or cession ( rhymes with session ) means an act or instance of giving something up or yielding something, as in a treaty--
The new treaty calls for the cession of some territory.
They'll never agree to the cession any of their land or territory.

Now that you know that, you can say--
"This session of the treaty negotiations will be about the cession of the disputed territory."

Note--"cession" is a noun ( thing or idea ) form of "cede", meaning to give up--
The other side is demanding that we cede this territory.
Not to be confused with "concede", meaning to give up a point, or to agree that the other party is right about a disputed point--
They may argue all day, and neither will concede the point.
Note # 2--"cessation" is a noun ( thing or idea ),, a form of "cease", meaning to stop. Cessation means an end or stop--
They agree to a cessation of hostilities, and to the terms of the treaty.

seed, cede

Seed or seed means the small kernel a plant uses to reproduce itself, and which people use to grow plants--
Make sure to put one seed in each hole. Then cover them with dirt.
Each seed will grow into a plant.
Corn kernels are also corn seeds. If you plant one it may grow a cornstalk.

Cede or cede ( rhymes with seed ) means to give over or surrender as a  term of a treaty or pact--
One of the terms of the treaty stipulates that they will cede all of the land they occupied during the war.
He will not agree to cede any territory.

Now that you know that, you can say--
"The soldier offered them bushels of grain seed, instead of the wagons they wanted him to cede."

Note--to "concede" is to finally agree with someone, or to admit that someone else is right--
Enough arguing! I concede the point!
He refused to concede that fiction is not the same as fact.