It seems like you're asking for explanations of various musical elements. Here's a brief overview:

1. Dynamics: This refers to the volume of a sound or note. The term is also applied to the written or printed musical notation used to indicate dynamics. Dynamics are relative and do not refer to specific volume levels.

2. Form & Structure: This refers to the overall structure or plan of a piece of music, and it describes the layout of a composition as divided into sections. Common forms include the ternary (ABA), binary (AB), and rondo (ABACA) forms.

3. Ensemble: This is a group of musicians who perform together. The ensemble can vary in size and composition, ranging from a small band or chamber ensemble to a full symphony orchestra. The type of ensemble often depends on the style of music being performed.

4. Solo/cantor chorus; duet; Ternary etc: These are specific types of musical forms or ensembles. A solo is a piece performed by a single musician. A cantor chorus refers to a type of singing in which a soloist (the cantor) is answered by a chorus. A duet is a piece performed by two musicians. Ternary form is a three-part musical form where the first section (A) is repeated after the second section (B) ends.

5. Zimbabwean -marimba ensemble: This refers to a specific type of ensemble common in Zimbabwean music, where the primary instrument is the marimba, a type of percussion instrument. The ensemble may also include other instruments, such as drums or other types of percussion.