Subject :Sam Class : Sample
On Earth, green plants are useful and needed by animals as they ____.
(i) Provide shelter.
(ii) Are food producers.
(iii) Produce oxygen.
(iv) Produce carbon dioxide.
(A) (i) & (iv)
(B) (i), (ii) & (iii)
(C) (ii), (iii) & (iv)
(D) (i), (ii), (iii) & (iv)