The last option is correct. The passage uses a specific example, but the main idea of the passage is that the systems in our body are connected, so laughter (because it’s a sign of happiness) can relieve stress and boost our immune system.
A local environmental group has less volunteers than the national group which means less help, but it helps to get more actual spending funds
a national group has many volunteers from around the country, but funds are usually to low to actually pay for the cause since most of it was used to pay f associations
She locks her husband and Jennie out of the room for all of those reasons.
She is attempting to free the woman from behind the wallpaper (and herself from the constraints of her husband's cruelty). In order to free the woman, she has to be able to remove the wallpaper. Since, as the narrator describes the situation, it's fairly clear that she's going insane, she believes that she has to get all the wallpaper off so that they can't put the woman (her) back into the wall. It's important to the narrator that they not stop her from removing the paper.
