Rewrite $$the $$underlined $$parts $$of $$the $$following $$sentences $$using $$a $$noun $$or $$noun $$phrase $$instead $$of $$the $$

$"$

wh

$"$

$$clause$.$

The $$experiment $$has $$shown $$that $$bees $$can $$convey $$where $$food $$is $$to $$one $$another$.$

There $$is $$a $$decline $$in $$labor $$productivity $$and $$it $$is $$related $$to $$how $$much $$the $$population $$density $$is $$increasing$.$

It $$is $$important $$to $$discuss $$how $$much $$cultural $$evolution $$can $$be $$explained $$by $$similar $$principles$.$

Many $$factors $$must $$be $$considered $$in $$explaining $$how $$fast $$the $$population $$has $$grown $$in $$this $$country$.$

It $$differs $$greatly $$in $$how $$membership $$is $$established $$and $$how $$fast $$membership $$changes$.$

Rewrite $$parts $$of $$the $$following $$sentences $$in $$two $$alternative $$passive $$form$,$beginning $$the $$sentences $$with $$

$"$

it

$"$

$,$

$$or $$beginning $$the $$sentences $$with $$the $$words $$in $$italics$.$

We $$expect $$that $$the $$drought $$will $$be $$relieved$.$

They $$believe $$that $$extra $$vitamin $$provides $$more $$energy$.$

People $$thought $$that $$the $$blast $$occurred $$when $$volatile $$chemicals $$exploded$.$

Some $$researchers $$claim $$that $$playing $$a $$musical $$instrument $$can $$improve $$cognitive $$skills$.$

At $$the $$present $$time$,$researchers $$believe $$that $$the $$only $$problem $$with $$daytime $$sleep $$is $$that $$it $$is $$too $$short$.$