A mold is a hollow container that you pour liquid into. When the liquid becomes solid, it takes the same shape as the mould.
If someone forges an object out of metal, they heat the metal and then hammer and bend it into the required shape.
A challenge is something new and difficult which requires great effort and determination.
If you engage in an activity, you do it or are actively involved with it. If something engages you or your attention or interest, it keeps you interested in it and thinking about it.
If you can distinguish one thing from another or distinguish between two things, you can see or understand how they are different.
The way that two things relate, or the way that one thing relates to another, is the sort of connection that exists between them.
To facilitate an action or process, especially one that you would like to happen, means to make it easier or more likely to happen.
* чего следует избегать лидерам. видеоролик на английском с разными говорителями.