Given a scientific passage and an answer, generate a question for the given answer.

[Q]: Passage: Many species use their body shape and coloration to avoid being detected by predators. The tropical walking stick is an insect with the coloration and body shape of a twig which makes it very hard to see when stationary against a background of real twigs (Figure 45.20a). In another example, the chameleon can change its color to match its surroundings (Figure 45.20b). Both of these are examples of camouflage, or avoiding detection by blending in with the background. Answer: detection by predators
[A]: Many species use their body shape and coloration to avoid what?

[Q]: Passage: The electron cloud of a helium atom contains two electrons, which can normally be expected to be equally distributed spatially around the nucleus. However, at any given moment the electron distribution may be uneven, resulting in an instantaneous dipole. This weak and temporary dipole subsequently influences neighboring helium atoms through electrostatic attraction and repulsion. It induces a dipole on nearby helium atoms (see Figure below ). Answer: an instantaneous dipole
[A]: A weak and temporary dipole that influences nearby atoms through electrostatic attraction and repulsion is known as what?

[Q]: Passage: About half the energy used in the U. S. is used in homes and for transportation. Businesses, stores, and industry use the other half. Answer: half (fifty)
[A]:
Homes and transportation use what percent of all energy in the u.s.?