3. What do all mammals have in common in regards to how they raise their offspring? They produce milk to nourish their young. Thay give birth to live young. They use pouches to care for newborns. They lay oggs.

## Step 1<br />The question asks us to identify a common characteristic among all mammals in terms of how they raise their offspring. The options provided are:<br />- They produce milk to nourish their young.<br />- They give birth to live young.<br />- They use pouches to care for newborns.<br />- They lay eggs.<br /><br />## Step 2<br />We need to evaluate each option based on the known characteristics of mammals.<br /><br />## Step 3<br />The first option, "They produce milk to nourish their young," is a characteristic of all mammals. This is because all mammals have mammary glands that produce milk young.<br /><br />## Step 4<br />The second option, "They give birth to live young," is not a characteristic of all mammals. While most mammals give birth to live young, there are exceptions such as monotremes (like the platypus and echidna) which lay eggs.<br /><br />## Step 5<br />The third option, "They use pouches to care for newborns," is not a characteristic of all mammals. This is a characteristic of marsupials, a specific group of mammals, but not all mammals.<br /><br />## Step 6<br />The fourth option, "They lay eggs," is not a characteristic of all mammals. This is a characteristic of reptiles and birds, not mammals.