A characteristic which enables an organism to live in an environment is called

Does light factor affect the distribution of organisms ? Write a brief note giving suitable examples of either plants or animals.

If a fresh water fish is placed in an aquarium containing sea water, will the fish be able to survive ? Explain giving reasons.

Consider the following statements $(A - D)$ each with one or two blanks.

$(A)$ Some snails go into _____$(i)$_____ to avoid ____$(ii)$_____ related problems.
$(B)$ Since small animals have a ____$(iii)$___ surface area relative to their volume, they tend to lose body heat
_____$(iv)$______ when it is cold outside.
$(C)$ Next to temperature, _____$(v)$____ is the most ecologically important environmental factor.
$(D)$ Every ____$(vi)$____ the famous Keolado National Park in Rajasthan host thousands of migrating birds.
Which one of the following option gives the correct fill ups for the respective blank numbers from $(i)$ to $(vi)$ in
the statements?

$A$ - The salt concentration is less than $5$ (parts per thousand) in inland waters.

$R$ - The salt concentration is $45 -50$ (parts per thousand) in the sea.