Question

how does hot and humid climate favour spinning and weaving

Answer 1

the ideal time for cotton spinning is in relative humidity
the humidity is needed higher when cotten is woven 
the wet strength of cotton is higher than dry strength of cotton
and to get this advantage humid climate is maintained in spinning and weaving.

Answer 2

The hot and humid climate prevents the thread from breaking due to the presence of moisture.


                                               Hope it helps............