Answer
Three adaptations for life on land are: the amniotic egg which retains water and is generally more durable than earlier appearing eggs, the ribcage used to ventilate the lungs more efficiently, and less-permeable, water-conserving skin.
Work Step by Step
This can be found on p. 728-729. Look at the listed features and ask yourself what helps to hold water at whatever stage of the life cycle is mentioned.
