supposition or proposed explanation made on basis of limited evidence as starting point for further investigation. Theories trying to explain some things.

Easily understood and clear; plain to see.

thing chosen. Two or more of several choices. buy or sell option on.

From one end or side of something to the other. From the beginning of something until the end. By a particular way or process; by the use of.

any of more or less distinct parts into which something is or may be divided or from which it is made up. Specific areas or regions within a larger place. divide into sections.

sixty seconds. Notes taken at meetings to record what was said.

be controlled or determined by.

Act of moving with your legs at a slowish pace. To move with your legs at a slowish pace.

Agreement to pay someone to kill a person. To reduce in size, length due to heat loss.

To rent; pay money to use something, e.g. car.

class or division of people or things regarded as having particular shared characteristics. Groups of things that are similar in some way.

sentence worded or expressed so as to elicit information. Issues or problems you are dealing with. To have or express concerns or uncertainty.

Assistance or advice given to someone. bear all or part of weight of.

action of helping or doing work for someone. To help or do work for someone, e.g. in a store.

small, narrow river. Classes split into ability levels. To split classes or students into ability levels.