As the temperature of a medium increases, the speed of the sound wave
increases because the particles bump into each other more often.
increases because the particles bump into each other less often.
decreases because the particles bump into each other more often.
decreases because the particles bump into each other less often.

Answer : As the temperature of a medium increases, the speed of the sound wave increases because the particles bump into each other more often.  

Explanation :

The dependency of the speed of the sound wave and the temperature of the medium is :

Where

= ratio of specific heat

R is gas constant

T is the temperature

The speed of the wave is directly proportional to the temperature. As the temperature of a medium increase, the speed of the sound increase. The particles start vibrating faster. Hence, they bump into each other.

Hence, the correct option is (A).

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.

answer; 4 electrons;