Out of boilers and layers,which one is used to produce eggs?

Group the following crops and tabulate them as energy-yielding,protein-yielding,oil-yielding,and fodder crops: Wheat,rice,berseem,maize,gram,oat,pigeon pea,sudan grass,lentil,soybean,groundnut,castor,and mustard.

The kind of flowers available determines the taste of honey.

The housing, nutritional and environmental requirements of broilers are somewhat different from those of egg layers.

Sidak,when visiting a supermarket,was surprised to see yellow,green,and red-coloured capsicum available in the stalls. It was a drastic change in the quality and quantity of capsicum.
$(a)$ What is this change due to?
$(b)$ How are such crops produced?

$(a)$ Give two examples of shellfishes.
$(b)$ Mention the names of four marine fish of high economic value.