Analyze the relationship between 'mobility' and 'train' within the context of the input sentence.
Options: product/material produced, chief executive officer, position held, headquarters location

Because the modularity or the power train is the trick here, meaning that a lot of the electro mobility propulsion components when it comes to e-axels, gearboxes, control systems, management systems around these – and then obviously the whole modularity around the vehicle as such, because when we talk about electric mobility and fuel cells, you should still have the high performing truck you know, which is sometimes forgotten.
product/material produced