Peter believes that his newborn already detects a difference between when he walks away from her and when he walks toward her, and that she understands that these two actions will lead to different outcomes for her. Peter's beliefs are most similar to those of a(n)

When parents are unable or unwilling to take care of their children, some grandparents become ______

Fill in the blank with correct word

Research on same-sex partnerships shows that_________

a. more people in the U.S. now support same-sex marriages than oppose them b. same-sex partners take on "male" and "female" roles c. same-sex couples and different-sex couples are more different than alike d. in the early years of the relationship, lesbian couples have more sex than do gay or heterosexual couples