The planets in our solar system are measured in light years, have circular orbits

Secondary pollutants are more harmful than primary pollutants. select the best answer from the choices provided ot of

Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water