You are looking at a list of items that follows the words, "In addition to the required..." and also continues to say "one or more of....".
The first thing is to understand this means "not required" and then to take "one or more...." literally. You'll probably concentrate on the last item, "any other...." which will be evidence of time spent together in person. Think passport stamps, boarding passes, receipts, as primary evidence and photos together as secondary evidence.