A. natural enemies destroy their eggs on land
B. water nourishes their embryos and their young ones
C. they are close to their ancestors and imitate them
D. the temperature on land is not suitable for the development of their embryos
Correct Answer: Option D
D. the temperature on land is not suitable for the development of their embryos
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![A quantity of hot water at 100ºC is added to 400g of water at 10ºC until the temperature of the mixture is 60ºC. Calculate the mass of the hot water added. [Specific heat capacity of water =4200JKg-1 K-1]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "A quantity of hot water at 100ºC is added to 400g of water at 10ºC until the temperature of the mixture is 60ºC. Calculate the mass of the hot water added. [Specific heat capacity of water =4200JKg-1 K-1]")