What does the small raised number 4 mean

Which type of conflict does della face in o. henry’s “the gift of the magi”? a. character versus society b. character versus machine c. character versus character d. character versus nature

Which is not covered under the common topic “relationship” a. causes and effects b. comparisons and contrasts c. contraries and contradictions d. antecedents and consequences

Can someone give me the main topics discussed in english segment 2 dba ( lesson 3.09 )