Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor aids Taron against encroaching ice
S10E17
·
Planet of the Daleks Part 3
To
Marat holds the door as Daleks arrive
S10E17
·
Planet of the Daleks Part 3
Why These Connect
The narrative assertion
"Taron contacting the Doctor precipitates Marat's sacrifice as the Daleks close in, showing how the convergence of groups escalates danger and forces desperate choices."
About Causal Connections
A directly causes B. The first event sets forces in motion that produce the second. These are the load-bearing connections of plot--remove one and the story structure collapses.