Regarding mass selection,which statement is most suitable?

The various methods of crop improvement are:
$I$. Selection
$II$. Hybridization
$III$. Polyploidy
$IV$. Mutation breeding
$V$. Genetic engineering
Choose the correct option.

Where was $IR-8$ developed?

Arrange the following steps in the correct sequence for breeding a genetically diverse crop variety:
$I -$ Cross-hybridization among the selected parents
$II -$ Testing, release, and commercialization of new cultivars
$III -$ Selection and testing of superior recombinants
$IV -$ Collection of variability
$V -$ Evaluation and selection of parents

What is $Triticum$ $aestivum$?

Why does the sawfly not select wheat?