Final answer:
According to the poet, the Zulu people are resilient and unbothered by the cold.
Step-by-step explanation:
In the given line of the poem, 'An old... heat', the poet portrays the emotions and attitudes of the Zulu people as resilient and unbothered by the cold. The use of the word 'old' suggests that the Zulu people have endured and overcome cold temperatures in the past, indicating their resilience. Additionally, the phrase 'heat' implies that they have ways of staying warm and comfortable despite the cold weather. Therefore, option A) The Zulu people are resilient and unbothered by the cold is the correct answer.