Pick from:
(i) nutrients.
(ii) warmth.
(iii) hormones.
(iv) energy.
(v) Energy..
(vi) sunlight.
(vii) heat.
(viii) seeds.
Given those answer options, answer the question: Fact 1: An egg requires warmth to survive. Fact 2: Egg laying mammals are called monotremes. Given the two facts above, monotremes require what for incubation?
A:
(ii)