Grid method of mass selection is also called:

✅Explanation:
The grid method of mass selection, originally proposed by Gardner in 1961, is indeed also known as stratified mass selection. This name accurately reflects the key feature of the method: dividing the field into smaller subplots (grids) before selecting superior plants.

Other options explanations:
-Cyclic selection: This method involves alternating cycles of selection and intercrossing within different groups of individuals. 
-Indirect selection: This refers to selecting for a correlated trait instead of the desired trait itself. While sometimes used in breeding
-Modified mass selection: While the grid method is indeed a modification of the traditional mass selection approach, it has its own distinct name, "stratified mass selection".

🔴Related Terminologies::
-Stratification: Dividing a population into subgroups based on certain characteristics.
-Subplot: A smaller section within a larger experimental area.
-Environmental variation: Differences in growing conditions within a field that can affect plant performance.
-Heritability: The proportion of phenotypic variation due to genetic variation.