Which of the following has provided the main food source for humans?

According to $NCERT$ text, which of the following are steps involved in the selection and testing of superior recombinants in plant breeding?

Consider the following statements:
$I$. Breeding of animals is very important for animal husbandry.
$II$. Both the male and female animals selected for breeding should be of superior quality.
$III$. The word 'husbandry' means the management of domestic affairs.
$IV$. In our country,poultry mainly means chickens,domesticated for eggs.
$V$. Cows and buffaloes generally give more milk than goats and sheep.
$VI$. The yellow colour of buffalo milk is due to carotene.
Which of the statements given above are true and which are false?
$I \; II \; III \; IV \; V \; VI$

Consider the following statements:
$I$. Solid stem in wheat exhibits non-preference by stem sawfly.
$II$. In cotton,smooth leaf and absence of nectar repel bollworms.
$III$. In maize,high aspartic acid,low nitrogen and sugar content protect them from stem borers.
Which of the statements given above are correct?

Growing crop plants in monoculture results in ........

Match the organisms in Column $I$ with their economic importance in Column $II$.

Column $I$ (Organism)	Column $II$ (Economic importance)
$i$. $Trachardia$ $lacca$	$a$. Used to produce oils,soaps and isinglass
$ii$. $Bombyx$ $mori$	$b$. Helps in pollination of crops
$iii$. $Cirrhina$ $mrigala$	$c$. Resin-like substance produced by dermal glands
$iv$. $Apis$ $mellifera$	$d$. Best quality of mulberry silk is produced