Which of the following is not a biotic component

$I.$ Biochemical adaptation are seen in organisms living in great depth of the ocean to face crushing pressure

$II.$ Allen's rule is explain mammals living in colder climates

$III.$ Altitude sickness is caused because of body not getting enough oxygen due to low atmospheric pressure at high altitude

$IV.$ Desert lizards lack behavioural means to manage to their body temperature

Choose the correct option for above adaptations

Soil erosion is greater when

Which of the following is ecological energy source

Benthic organisms are affected the most by