Can Spiritual Weapon gets advantage because of flanking creature?

Does a Warlock need proficient in pact weapon?

Does knocking a creature climbing, cause it to Fall or land Prone?

If a PC has prof in Intimidate, does that apply to Intimidate (Str) or just to Intimidate (Cha)?

Can monk keep the benefit of tranquility if he uses the optional ‘disarm’?

Can non Druids learn Druidic?