Characteristic feature of mangrove plants is

Pneumatophores are useful in

Plants like $Rhizophora$ and $Avicennia$ grow on the sea shores under saline conditions. For this,they have special roots for respiration which are called:

Which of the following pairs are correctly matched?
$(1)$ Assimilatory roots — Photosynthesis
$(2)$ Fasciculated roots — Food storage
$(3)$ Stilt root — Mechanical support
$(4)$ Sucking root — Absorption of moisture from the air
Select the correct answer:

Epiphyllous roots in $Begonia$ and $Bryophyllum$ are

In $Dahlia$,the roots are