Puppets are powerful learning tools because:
a. they are appropriate props for teachers to use in story-retellings
b. they are a non threatening vehicle for self-expression
c. they are complicated to make
d. they can easily be found in stores

The correct answer is B. They are a non-threatening vehicle for self-expression

Explanation:

Puppets refer to movable figures or models you can manipulate by putting your hand inside. In education, puppets are quite popular in kindergarten and the primary school because these are very useful to teach children, and also allow children to express themselves. This can be explained as puppets are seen as a non-threating vehicle for self-expression, which means you can use puppets to express own thoughts, ideas, tell stories or explain something creatively and from the voice of the puppet. This makes you feel more confident to speak to others and also, makes children or the audience be more interested. Therefore, puppets are powerful learning tools because "they are a non-threatening vehicle for self-expression".

b) trade is easy because of the direct line between their major ports. bilateral trade reached 89,6 thousand million.

intimacy, passion and commitment are the components of a interpersonal relationship emphasized in the triangular theory of love by robert sternberg.

the triangular theory of love says love can be comprehend as this componest form the vertices of a triangle.  

intimacy relates to feelings such as of closeness and connection;

passion relates the drives that brings people together, as physical attraction.

commitment relates to the being in a long-term relationship.