B1
If a situation or activity involves something, that thing is a necessary part of it.
Dictionary examples:
Learning a new language involves making funny sounds and feeling silly. (0.0)
Cooking for the first time usually involves burning something and ordering pizza. (0.0)
Texting while walking involves bumping into things and looking stupid. (0.0)
The trips often involve a lot of walking. (20.3)
The course involves a huge amount of reading. (21.3)
There are a lot of risks involved. (28.1)